DTC Trouble Code Index (Discovery 3)

NOTE: Generic scan tools cannot read the codes listed or can only read 5-digit codes. Match the 5 digits from the scan tool with the first 5 digits of the listed 7-digit code to identify the fault. (the last 2 digits provide additional information readable by a manufacturer approved diagnostic system).

NOTE: Intermittent malfunctions may cause DTCs to be stored, however, some DTCs may be cleared during an ignition cycle. Perform a road test (if it is safe), check the system functionality and read all DTCs before turning off the ignition.

DTC codes	Description	Possible reasons	Actions
B1A8455	Vehicle configuration data	Data does not match expected according to VIN/ Air suspension configuration is not set correctly	Configure the vehicle configuration file (CCF) using an approved diagnostic system. Clear DTCs and verify proper system operation.
C112201	Steering shut-off valve	Disconnecting the Servotronic steering Servotronic steering valve circuit(s) high resistance or short to ground Servotronic steering valve malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
C11231C	Steering shut-off valve electrical circuit	High resistance in the electrical supply circuit of the Servotronic steering valve Short circuit to ground in the electrical supply circuit of the Servotronic steering valve Short circuit to battery + in the electrical supply circuit of the Servotronic steering valve Servotronic steering valve malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
C112F72	Pneumatic spring valve	Repeated or frequent action in a downward direction Angle valve stuck open Leak in corner valve to gallery	To check the angle valve, refer to an approved diagnostic system.
C113066	Air supply to the pneumatic spring	Repeated or frequent action in an upward direction Leak in the air spring Air line leak Exhaust valve stuck open Leak in corner valve to gallery	Visually inspect the system for air leaks. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C11307A	Air supply to the pneumatic spring	Unable to lift the car Disconnected air duct Loose or broken air duct Increased leakage in the air spring Height sensor stuck Height sensor failure Blockage in the air line	Visually inspect the system for excessive air leakage. Inspect the height sensor linkage(s) for damage/obstruction. Visually inspect the air line for signs of melting, squashing, twisting, or collapse. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C113192	Air supply to the pneumatic spring	Unable to create pressure in gallery Insufficient pressure from the compressor Disconnected air duct Loose or broken air duct Incorrectly installed receiver valve block pipes (the fittings are upside down) Pressure sensor failure	Visually inspect the system for air leaks. Check that the receiver valve block piping is correctly routed and installed.
C1A001C	Control module	Short-term low voltage Low battery voltage Power supply to one or more control valves: intermittent short circuit to ground	Check the battery charge, condition and electrical circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A001D	Control module	Isolation switch current control Power supply of one or more valves: short circuit to ground The rear valve block is disconnected Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A0049	Control module	Water entering the electrical harness or electrical connectors of the valve Valve power supply circuit(s): short circuit to battery + Air Suspension Control Module: Internal Electrical Malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A0053	Control module	This is not a malfunction, the air was released from the system using a diagnostic program.	Perform the air suspension bleed recovery program using the approved diagnostic system or the program listed at the end of this section.
C1A0054	Control module	Air suspension control module not calibrated The air suspension control module has been set to fabrication, calibration, or tight tolerance mode	If a problem is found during the predelivery inspection, using the approved diagnostic system, verify that the Air Suspension Control Module (RLM) is NOT in Manufacturing Mode, Calibration Mode, or Tight Tolerance Mode. If necessary, set the RLM configuration to Custom Mode (Tight Tolerance Mode or Manufacturing Mode can be set/cleared by starting and then stopping the Suspension Geometry Setup process from the IDS menu. Refer to the applicable Technical Service Bulletin (TSB)). Clear the DTCs and verify the system operates correctly. The system calibration using the approved diagnostic system should only be performed if the DTC re-sets. Clear the DTCs and verify the system operates correctly.
C1A0119	LED	Switch block LED electrical circuit: short circuit to battery + One or more LEDs are shorted to each other	Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A031C	Left Front Height Sensor	Left Front Height Sensor: Signal Voltage Out of Operating Range Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Damage/bending of the height sensor linkage Disconnecting the height sensor Switching the height sensor lever mechanism (now works in reverse) Damage/bending of the height sensor bracket Incorrect installation of the height sensor The height sensor is installed on the wrong side of the vehicle. Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Incorrect altitude calibration Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the Guided Diagnostics program on the approved diagnostic system for height sensor linkage, mounting, and electrical circuit tests. Inspect the condition of the bracket and the security of the height sensor mounting. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system. If the module is suspected, refer to the Warranty Policy and Procedures manual.
C1A0326	Left Front Height Sensor	Left Front Height Sensor: Signal Voltage Stuck When Vehicle Is Moving Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A0329	Left Front Height Sensor	Left Front Height Sensor: Invalid Signal Water entering the wiring harness or electrical connectors Damage/bending of the height sensor linkage Damage/bending of the height sensor bracket Incorrect installation of the height sensor Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Incorrect altitude calibration process	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Inspect the condition of the bracket and secure mounting of the height sensor. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any of the height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system.


C1A0392	Left Front Height Sensor	Left Front Altitude Sensor: Altitude change is slower than expected Interference with suspension movement Incorrect installation of the height sensor Leak in the air spring Air line leak Air line blockage/damage Blockage/damage to gallery pipeline Angle valve stuck in closed position Incorrectly installed front or rear valve block lines (the fittings are upside down) Incorrectly installed receiver valve block pipes(the fittings are upside down) The receiver valve is stuck in the open position. The exhaust valve is stuck in the closed position. Air leak in the angle valve Pressure sensor failure Height sensor failure	Make sure there are no obstructions on the vehicle. Check the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle ride height must be recalibrated. Calibrate the system using the approved diagnostic system. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Check for an air spring air leak. Check the air line for signs of melting, squashing, twisting, or destruction. Check the front and rear valve block lines for proper routing and installation. Check the receiver valve block lines for proper routing and installation. Refer to the approved diagnostic system to check the corner valve, receiver, and outlet valve. Check the corner valve for leaks.
C1A041C	Right Front Height Sensor	Right Front Height Sensor: Signal Voltage Out of Operating Range Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Damage/bending of the height sensor linkage Disconnecting the height sensor Switching the height sensor lever mechanism (now works in reverse) Damage/bending of the height sensor bracket Incorrect installation of the height sensor The height sensor is installed on the wrong side of the vehicle. Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Incorrect altitude calibration Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. Inspect the condition of the bracket and the security of the height sensor mounting. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system. If the module is suspected, refer to the warranty policy and procedures manual.
C1A0426	Right Front Height Sensor	Right Front Height Sensor: Signal Voltage Stuck When Vehicle Is Moving Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A0429	Right Front Height Sensor	Right Front Height Sensor: Invalid Signal Water entering the wiring harness or electrical connectors Damage/bending of the height sensor linkage Damage/bending of the height sensor bracket Incorrect installation of the height sensor Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Incorrect altitude calibration process	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Inspect the condition of the bracket and secure mounting of the height sensor. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any of the height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system.
C1A0492	Right Front Height Sensor	Right Front Altitude Sensor: Altitude change is slower than expected Interference with suspension movement Incorrect installation of the height sensor Leak in the air spring Air line leak Air line blockage/damage Blockage/damage to gallery pipeline Angle valve stuck in closed position Incorrectly installed front or rear valve block lines (the fittings are upside down) Incorrectly installed receiver valve block pipes(the fittings are upside down) Receiver valve stuck in open position Exhaust valve stuck in closed position Air leak in the angle valve Pressure sensor failure Height sensor failure	Make sure there are no obstructions on the vehicle. Check the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle ride height must be recalibrated. Calibrate the system using the approved diagnostic system. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Check for an air spring air leak. Check the air line for signs of melting, squashing, twisting, or destruction. Check the front and rear valve block lines for proper routing and installation. Check the receiver valve block lines for proper routing and installation. Refer to the approved diagnostic system to check the corner valve, receiver, and outlet valve. Check the corner valve for leaks.
C1A051C	Left rear height sensor	Left Rear Height Sensor: Signal Voltage Out of Operating Range Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Damage/bending of the height sensor linkage Disconnecting the height sensor Switching the height sensor lever mechanism (now works in reverse) Damage/bending of the height sensor bracket Incorrect installation of the height sensor The height sensor is installed on the wrong side of the vehicle. Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Incorrect altitude calibration Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. Inspect the condition of the bracket and the security of the height sensor mounting. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system. If the module is suspected, refer to the warranty policy and procedures manual.
C1A0526	Left rear height sensor	Left Rear Height Sensor: Signal Voltage Stuck When Vehicle Is Moving Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A0529	Left rear height sensor	Left Rear Height Sensor: Invalid Signal Water entering the wiring harness or electrical connectors Damage/bending of the height sensor linkage Damage/bending of the height sensor bracket Incorrect installation of the height sensor Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Incorrect altitude calibration process	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Inspect the condition of the bracket and secure mounting of the height sensor. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any of the height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system.
C1A0592	Left rear height sensor	Left Rear Altitude Sensor: Altitude change is slower than expected Interference with suspension movement Incorrect installation of the height sensor Leak in the air spring Air line leak Air line blockage/damage Blockage/damage to gallery pipeline Angle valve stuck in closed position Incorrectly installed front or rear valve block lines (the fittings are upside down) Incorrectly installed receiver valve block pipes(the fittings are upside down) Receiver valve stuck in open position Exhaust valve stuck in closed position Air leak in the angle valve Pressure sensor failure Height sensor failure	Make sure there is nothing blocking the vehicle. Check the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle ride height must be recalibrated. Calibrate the system using the approved diagnostic system. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Check for an air leak in the air spring. Check the air line for signs of melting, squashing, twisting, or destruction. Check the front and rear valve block lines for proper routing and installation. Check the receiver valve block lines for proper routing and installation. Refer to the approved diagnostic system to check the corner valve, receiver, and outlet valve. Check the corner valve for leaks.
C1A061C	Right rear height sensor	Right Rear Height Sensor: Signal Voltage Out of Operating Range Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Damage/bending of the height sensor linkage Disconnecting the height sensor Switching the height sensor lever mechanism (now works in reverse) Damage/bending of the height sensor bracket Incorrect installation of the height sensor The height sensor is installed on the wrong side of the vehicle. Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Incorrect altitude calibration Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. Inspect the condition of the bracket and the security of the height sensor mounting. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system. If the module is suspected, refer to the warranty policy and procedures manual.
C1A0626	Right rear height sensor	Right Rear Height Sensor: Signal Voltage Stuck When Vehicle Is Moving Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Altitude sensor malfunction Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A0629	Right rear height sensor	Right Rear Height Sensor: Invalid Signal Water entering the wiring harness or electrical connectors Damage/bending of the height sensor linkage Damage/bending of the height sensor bracket Incorrect installation of the height sensor Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Incorrect altitude calibration process	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Inspect the condition of the bracket and secure mounting of the height sensor. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any of the height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system.
C1A0692	Right rear height sensor	Right Rear Altitude Sensor: Altitude change is slower than expected Interference with suspension movement Incorrect installation of the height sensor Leak in the air spring Air line leak Air line blockage/damage Blockage/damage to gallery pipeline Angle valve stuck in closed position Incorrectly installed front or rear valve block lines (the fittings are upside down) Incorrectly installed receiver valve block pipes(the fittings are upside down) Receiver valve stuck in open position Exhaust valve stuck in closed position Air leak in the angle valve	Make sure there are no obstructions on the vehicle. Check the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle ride height must be recalibrated. Calibrate the system using the approved diagnostic system. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Check for an air spring air leak. Check the air line for signs of melting, squashing, twisting, or destruction. Check the front and rear valve block lines for proper routing and installation. Check the receiver valve block lines for proper routing and installation. Refer to the approved diagnostic system to check the corner valve, receiver, and outlet valve. Check the corner valve for leaks.
C1A0762	Operation of split anti-roll bars	Operation of split anti-roll bars: too much movement when the vehicle is moving Water entering the wiring harness or electrical connectors Damage/bending of the height sensor linkage Disconnection/Loosening of Height Sensor Linkage Damage/bending of the height sensor bracket Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance The altitude sensor was removed and reinstalled without recalibration. New altitude sensor installed without calibration Incorrect altitude calibration Height sensor failure	Follow the procedure described in the applicable Special Service Message (SSM). Check the condition and secureness of the height sensor bracket(s). Check the installation and tightening torque of the height sensor fasteners. If any of the height sensor fasteners are loose or the height sensor has been replaced, the vehicle ride height must be recalibrated. Calibrate the system using the approved diagnostic system.
C1A081C	Pressure sensor power supply	Pressure sensor supply voltage is out of operating range Pressure Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Pressure sensor failure Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A091C	Pressure sensor signal	Pressure sensor signal voltage out of operating range Disconnecting the pressure sensor Pressure Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Pressure sensor failure Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A1064	Pressure fluctuations when the system is inactive	The receiver and air spring lines are not connected correctly to the front or rear valve block. (the fittings are upside down) Angle valve stuck open Pressure Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Pressure sensor failure Air suspension control module malfunction	Verify receiver lines and air springs are properly routed and installed. Refer to the Guided Diagnostics program for this code on the approved diagnostic system. If the module is suspected, refer to the Warranty Policy and Procedures manual.
C1A1164	Pressure fluctuations when the system is inactive	The receiver and air spring lines are not connected correctly to the front or rear valve block. (the fittings are upside down) Internal leak in angle valve Internal leak in the receiver valve Pressure Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Pressure sensor failure	Check the receiver lines and air springs for proper routing and installation. For corner valve, receiver valve, pressure sensor and electrical circuit tests, refer to the guided diagnostic program on the approved diagnostic system.
C1A1364	The pressure does not decrease when the gallery is connected to the atmosphere.	Exhaust valve stuck in closed position The exhaust valve does not hold the minimum holding pressure Blockage/damage to gallery pipeline Pressure sensor failure Blockage/reduction in air suspension exhaust muffler flow Blockage/damage to the air suspension outlet pipe Incorrectly installed receiver valve block pipes(the fittings are upside down)	Refer to the guided diagnostic routine for this code on the approved diagnostic system. Check the air suspension exhaust pipe and muffler for blockage/restriction. Check the receiver valve block pipes for proper routing and installation.
C1A1864	Too rapid increase in pressure when filling the receiver	Receiver valve stuck in closed position Blockage/damage to the receiver pipeline Blockage/reduction of receiver port capacity Pressure sensor failure	Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A2064	Too slow increase in pressure when filling the receiver	Compressor failure Air leak in the receiver line Air leak in the receiver Air leak in gallery piping Clogged/clogged intake filter Blockage/reduction in flow capacity of intake manifold Blockage/reduction in air suspension intake muffler flow Angle valve stuck open Pressure sensor failure	Refer to the guided diagnostic routine for this code on the approved diagnostic system. Check the air suspension intake manifold and muffler for blockage/restriction.
C1A2464	No increase in temperature when compressor is requested	Air Compressor: Cylinder Head Temperature Sensor Disconnected Air Compressor: Cylinder Head Temperature Sensor Disconnected from Cylinder Head Air Compressor: Cylinder Head Temperature Sensor Malfunction Air compressor failure	Check the compressor cylinder head temperature sensor for looseness and electrical connection. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A2467	No increase in temperature when compressor is requested	Temperature reading too long after the compressor has been running for a certain period of time Air Compressor: Cylinder Head Temperature Sensor Disconnected Air Compressor: Cylinder Head Temperature Sensor Malfunction Disconnecting the air compressor Air Compressor Ground Circuit: High Resistance Air compressor failure	Check the compressor cylinder head temperature sensor for looseness and electrical connection. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A2616	Temperature sensor electrical circuit	Temperature sensor voltage out of operating range Air Compressor Cylinder Head Temperature Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A2712	Compressor chain	Compressor voltage present when compressor is not requested Air Compressor Wiring Harness: Short to Battery + Air compressor relay failure Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A2714	Compressor chain	Compressor voltage present when compressor is requested Air suspension control module power supply circuit (COMP_V) fuse fault in battery junction box (BJB) Faulty/not installed fusible link for air and air supply relay/air compressor power supply in BJB Air Compressor Wiring Harness Short to Ground or High Resistance Air compressor relay failure Air suspension control module malfunction	Check/replace fuses as needed. Refer to the electrical manual. Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A2729	Compressor chain	Compressor Relay Control Voltage: Invalid Signal Air Compressor Wiring Harness: Short to Battery + Air compressor relay failure Air suspension control module malfunction	DTC C1A2712 will be generated first. Refer to the guided diagnostic program for this code on the approved diagnostic system. If the module is suspected, refer to the warranty policy and procedures manual.
C1A2864	Incorrect number of LEDs are lit	Incorrect number of LEDs lit on switch block Air suspension control module power supply circuit (BATTERY) fuse fault in battery junction box (BJB) Switch cluster wiring harness: short to ground, short to battery or high resistance LED electrical circuit: short circuit to battery + One or more LEDs are shorted to each other Switch block malfunction Air suspension control module malfunction	Check / replace the fuse if necessary. Refer to the electrical equipment manual. Refer to the electrical equipment manual and check the electrical circuits of the switch and LED unit. Replace/ repair if necessary. If a module is suspected, refer to the Warranty Policy and procedures manual.
C1A2992	Switch activation too long	Height adjustment switch activated too long The switch has been pressed for more than 255 seconds Switch cluster wiring harness: short to ground, short to battery or high resistance Switch block malfunction Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A3064	Both switches are pressed simultaneously	The up and down switches are activated simultaneously Air suspension control module power supply circuit (BATTERY) fuse fault in battery junction box (BJB) Switch cluster wiring harness: short to ground, short to battery or high resistance Switch block malfunction Air suspension control module malfunction	Check/replace fuse as needed. Refer to electrical manual. Refer to guided diagnostic routine for this code on approved diagnostic system. If module is suspected, refer to warranty policy and procedures manual.
C1A3101	Left Front Corner Valve	Left Front Corner Valve General Electrical Malfunction Front valve block disconnected Front Valve Block Wiring Harness Short to Ground or High Resistance Left front corner valve faulty Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A3201	Right front corner valve	Right Front Corner Valve General Electrical Malfunction Front valve block disconnected Front Valve Block Wiring Harness Short to Ground or High Resistance Right front corner valve faulty Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A3301	Left rear corner valve	Left rear corner valve general electrical fault The rear valve block is disconnected Rear Valve Block Wiring Harness Short to Ground or High Resistance Left rear corner valve faulty Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A3401	Right rear corner valve	Right rear corner valve general electrical fault The rear valve block is disconnected Rear Valve Block Wiring Harness Short to Ground or High Resistance Right rear corner valve faulty Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A3501	Receiver valve	Receiver valve: general electrical fault The receiver valve block is disconnected Receiver Valve Block Wiring Harness: Short to Ground or High Resistance Receiver valve block malfunction Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A3601	Exhaust valve	Exhaust valve, general electrical fault The exhaust valve is disconnected Exhaust Valve Wiring Harness: Short to Ground or High Resistance Exhaust valve malfunction Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A3701	Front Position Control Valve	Front Position Control Valve: General Electrical Malfunction Front valve block disconnected Front Valve Block Wiring Harness Short to Ground or High Resistance Front Position Control Valve Malfunction Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A3801	Rear Position Control Valve	Rear Position Control Valve: General Electrical Malfunction The rear valve block is disconnected Rear Valve Block Wiring Harness Short to Ground or High Resistance Rear Position Control Valve Malfunction Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A5501	Ignition Switch Input Signal Circuit	Ignition Switch Input Circuit: Ignition On with Activation Off or Ignition Off with Engine Running Electrical circuit of the ignition switch input signal: ground short circuit, battery short circuit or high resistance	Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A681C	Power supply for left front height sensor	Left Front Height Sensor Power Supply: Voltage in electrical circuit out of operating range Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A691C	Right Front Height Sensor Power Supply	Right Front Height Sensor Power Supply: Voltage in electrical circuit out of operating range Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A701C	Power supply for left rear height sensor	Left Rear Height Sensor Power Supply: Voltage in electrical circuit out of operating range Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A711C	Power supply for the right rear height sensor	Right Rear Height Sensor Power Supply: Voltage in electrical circuit out of operating range Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
C1A721C	Left Front Height Sensor Mechanism	Left Front Height Sensor Signal Voltage Out of Operating Range (mechanical cause) Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Damage/bending of the height sensor linkage Disconnecting the height sensor Switching the height sensor lever mechanism (now works in reverse) Damage/bending of the height sensor bracket Incorrect installation of the height sensor Incorrect altitude calibration Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. Inspect the condition of the bracket and the security of the height sensor mounting. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system. If the module is suspected, refer to the warranty policy and procedures manual.
C1A731C	Left Front Height Sensor Mechanism	Right Front Height Sensor Signal Voltage Out of Operating Range (mechanical cause) Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Damage/bending of the height sensor linkage Disconnecting the height sensor Switching the height sensor lever mechanism (now works in reverse) Damage/bending of the height sensor bracket Incorrect installation of the height sensor Incorrect altitude calibration Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. Inspect the condition of the bracket and the security of the height sensor mounting. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system. If the module is suspected, refer to the warranty policy and procedures manual.
C1A741C	Left Rear Height Sensor Mechanism	Left Rear Height Sensor Signal Voltage Out of Operating Range (mechanical cause) Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Damage/bending of the height sensor linkage Disconnecting the height sensor Switching the height sensor lever mechanism (now works in reverse) Damage/bending of the height sensor bracket Incorrect installation of the height sensor Incorrect altitude calibration Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. Inspect the condition of the bracket and the security of the height sensor mounting. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system. If the module is suspected, refer to the warranty policy and procedures manual.
C1A751C	Right Rear Height Sensor Mechanism	Right Rear Height Sensor Signal Voltage Out of Operating Range (mechanical cause) Water entering the wiring harness or electrical connectors Disconnecting the height sensor linkage Damage/bending of the height sensor linkage Disconnecting the height sensor Switching the height sensor lever mechanism (now works in reverse) Damage/bending of the height sensor bracket Incorrect installation of the height sensor Incorrect altitude calibration Height Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Height sensor failure Air suspension control module malfunction	Visually inspect the wiring harness and electrical connectors for water ingress. Refer to the guided diagnostic program for this code on the approved diagnostic system. Inspect the condition of the bracket and the security of the height sensor mounting. Inspect the height sensor mounting hardware for proper installation and tightening torque. If any height sensor mounting hardware is loose or the height sensor has been replaced, the vehicle's ride height must be recalibrated. Calibrate the system using the approved diagnostic system. If the module is suspected, refer to the warranty policy and procedures manual.
C1B1862	Cross-checking the supply voltage	Inconsistent battery voltage readings received by air suspension control module Air Suspension Control Module Power Circuit(s): Short to Ground Air Suspension Control Module Power Circuit(s) High Resistance Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1B1903	Door status signal	Door Status Signal, Pulse Width Modulation Signal Failure Incorrect software loaded into the air suspension control module Wiring harness between central junction box and air suspension module: short circuit to ground, short circuit to battery, high resistance Central electrical distribution box malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1B211C	Electrical circuit of the compressor motor brush holder temperature sensor	Compressor Motor Brush Holder Temperature Sensor Circuit Voltage Out of Operating Range Compressor Motor Brush Holder Temperature Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Compressor motor brush holder temperature sensor malfunction Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
U007388	Control module data bus "A" shutdown	Short circuit of CAN bus wires to each other	Refer to the "Network Communication" section in the service station manual.
U010087	Lost Communication with ECM/PCM "A"	CAN bus failure ECM is disconnected ECM configuration not set ECM failure	Refer to the "Network Communication" section in the service station manual.
U010187	Lost communication with gearbox control unit	CAN bus failure Transmission Control Module (TCM) is disconnected TCM configuration not set TCM malfunction	Refer to the "Network Communication" section in the service station manual.
U010287	Lost communication with the transfer case control unit	CAN bus failure Transfer Case Control Module Disconnected Transfer case control module configuration not set Transfer case control module malfunction	Refer to the "Network Communication" section in the service station manual.
U012287	Lost Communication with Vehicle Dynamics Control Module	CAN bus failure ABS module is disconnected ABS module configuration not set ABS module failure	Refer to the "Network Communication" section in the service station manual.
U012687	Lost Communication with Steering Angle Sensor Module	CAN bus failure SASM is disconnected SASM configuration not set/calibration not performed SASM malfunction	Refer to the "Network Communication" section in the service station manual.
U012887	Lost Communication With Parking Brake Control Module	CAN bus failure Parking brake module is disconnected Parking brake module configuration not set Parking brake module malfunction	Refer to the "Network Communication" section in the service station manual.
U013387	Lost Communication with Active Roll Control Module	CAN bus failure The vehicle's dynamic suspension system module is disconnected The vehicle dynamic suspension system module configuration is not configured ABS module failure	Refer to the "Network Communication" section in the service station manual.
U013687	Lost Communication with Rear Differential Control Module	CAN bus failure The rear differential electronic control module is disconnected The rear differential electronic control module configuration is not set Rear Differential Electronic Control Module Malfunction	Refer to the "Network Communication" section in the service station manual.
U015587	Lost Communication with Instrument Panel Control (IPC) Module	CAN bus failure The instrument cluster is disconnected Instrument cluster configuration not set Instrument cluster malfunction	Refer to the "Network Communication" section in the service station manual.
U030055	Internal control module software incompatibility	Incorrect software loaded CAN Wiring to Instrument Cluster: High Resistance Incorrect CAN configuration for instrument cluster	If necessary, configure the air suspension control module and instrument cluster using an approved diagnostic system.
U040186	Invalid data received from ECM/PCM A	Engine management system malfunction	Refer to the "Network Communication" section in the service station manual.
U041686	Invalid data received from vehicle dynamics control module	Warnings and messages: Warning - two beeps Display message - SLOW DOWN OR VEHICLE WILL LOWER (SLOW DOWN OR THE CAR WILL SLOW DOWN) Follow-up warning & warning message - one beep. Message -SUSPENSION LOWERED (THE SUSPENSION HAS LOWERED) Meaning - The vehicle has dropped to a lower altitude due to a malfunction in another vehicle system. ABS malfunction	Refer to the Network Communications section of the workshop manual. Check for ABS DTCs and make any necessary repairs.
U041786	Invalid data received from parking brake control module	Parking brake malfunction	Refer to the "Network Communication" section in the service station manual.
U042886	Invalid data received from steering angle sensor module (SASM)	SASM configuration not set/calibration not performed SAS failure	Check that the electrical connection is secure. Configure/calibrate the SAS using an approved diagnostic system. Refer to the Network Communications section in the workshop manual.
U043486	Invalid data received from Active Roll Control Module	Malfunction of the vehicle's dynamic suspension system	Refer to the "Network Communication" section in the service station manual.
U1A1387	Lost Communication with Terrain Response System Control Module	Lost connection with all terrain response optimization switches CAN bus failure Terrain Response Optimization Switch Disconnected Terrain Response Module Configuration Not Configured Terrain Response Module Malfunction	Refer to the "Network Communication" section in the service station manual.
U1A1449	CAN initialization failure	Internal electronic malfunction	Refer to the "Network Communication" section in the service station manual.
U1A3562	VIN data	VIN from the instrument cluster does not match VIN at the time of calibration The air suspension control module was relocated from another vehicle. Instrument cluster configuration not set	Configure the instrument cluster using an approved diagnostic system.
U200067	Electric motor temperature	Temperature sensor voltage reading too long after the compressor has been running for a certain period of time Compressor Motor Brush Holder Temperature Sensor Wiring Harness: Short to Ground, Short to Battery or High Resistance Compressor motor brush holder temperature sensor malfunction Compressor failure	Refer to the guided diagnostic program for this code on the approved diagnostic system.
U200701	Valve(s)	Short circuit to ground in the valve electrical circuit. Water entering the wiring harness or electrical connectors Valve Wiring Harness: Short to Ground or High Resistance Air suspension control module malfunction	DTC C1A001D will be generated first. Visually inspect the wiring harness and connectors between the air suspension control module and the control valves for water ingress. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
U200711	Valve(s)	Short circuit to ground in the electrical circuit of the valve when the system is inactive Water entering the wiring harness or electrical connectors Valve Wiring Harness: Short to Ground or High Resistance Air suspension control module malfunction	Visually inspect the wiring harness and connectors between the air suspension control module and the control valves for water ingress. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
U200719	Valve(s)	Current in the valve electrical circuit is above the threshold value Intermittent fault in the electrical circuit(s) supplying the valve: short to ground or high resistance Valve malfunction Air suspension control module malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
U200767	Valve(s)	Incorrect valve signal after event Water entering the wiring harness or electrical connectors Valve power supply circuit(s): short to ground, short to battery, or high resistance Air suspension control module malfunction	Visually inspect the wiring harness and connectors between the air suspension control module and the control valves for water ingress. Refer to the guided diagnostic routine for this code on the approved diagnostic system. If the module is suspected, refer to the warranty policy and procedures manual.