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).

DTC codes	Description	Possible reasons	Actions
C110501	Brake light control	General electrical fault Brake Light Activation (BLA) - short to battery + or ground Wiring harness/connector faulty	Refer to the electrical manual and check the BLA wiring harness. Make sure the wiring harness is not shorted to ground or power.
C110567	Brake light control	Incorrect signal after event. Problem with wiring harness Brake Light/Hill Descent Control Relay Problem	Check the operation of the brake light relay (also known as HDC relay) and the brake lights are working properly. Refer to the electrical manuals and check the brake light switch and circuits.
C110924	Vehicle Stability Control Switch	Signal Stuck at High Voltage - DSC Switch Malfunction (If the DSC switch is pressed for more than 1 minute, the switch appears to be inoperative.)	Refer to the electrical manuals and check the DSC switch and electrical circuits.
C1A0004	Control module	Vehicle Stability Control Module Internal Malfunction	If a module is suspected, refer to the warranty policy and procedures manual.
C1A0005	Control module	Vehicle Stability Control Module Programming Error	If a module is suspected, refer to the Warranty Policy and Procedures Guide.
C1A0016	Control module	Vehicle Stability Control Module Power Supply Circuit - Voltage Below Threshold Damage to the wiring harness/electrical connector Charging circuit malfunction Battery failure or discharge	Check the vehicle battery and charging system. Refer to the appropriate section in the service station manual. Refer to the electrical equipment manuals and check the electrical circuits of the module power supply.
C1A0017	Control module	Vehicle Stability Control Module Power Supply Circuit Voltage Above Threshold Charging circuit malfunction Battery failure or discharge	Check the battery voltage and charging system. Refer to the relevant section in the service station manual. Refer to the electrical equipment manuals and check the module power supply circuits.
C1A001C	Control module	Vehicle Stability Control Module Power Circuit Voltage Out of Range	Instantaneous low voltage, check vehicle battery and charging system. Refer to the relevant section in the service station manual. Refer to electrical equipment manuals and check the module power supply circuits.
C1A0041	Control module	Vehicle Stability Control Module Checksum Error	If a module is suspected, refer to the warranty policy and procedures manual.
C1A0042	Control module	Vehicle Stability Control Module General Memory Malfunction	If a module is suspected, refer to the warranty policy and procedures manual.
C1A0043	Control module	Vehicle Stability Control Module Memory Specific Malfunction	If a module is suspected, refer to the warranty policy and procedures manual.
C1A0044	Control module	Vehicle Stability Control Module Data Memory Malfunction	If a module is suspected, refer to the warranty policy and procedures manual.
C1A0045	Control module	Vehicle Stability Control Module Programming Memory Malfunction	Clear the DTCs and retest. If the problem persists after several attempts, replace the modulator. If the module is suspected, refer to the warranty policy and procedures manual.
C1A0046	Control module	Incorrect vehicle configuration file (CCF) data received from the instrument cluster (IPC) or incorrect CCF configuration. The installed modulator does not match the vehicle configuration Vehicle Stability Control Module Calibration/Parameter Memory Malfunction (internal error)	Reconfigure the module using the approved diagnostic system. Clear the DTC and check if the DTC is reset after reconfiguring the ignition after more than 10 seconds of ignition on. If the above is normal and the DTC remains, replace the modulator. If the module is suspected, refer to the warranty policy and procedures manual.
C1A0047	Control module	Vehicle Stability Control Module Control Microprocessor/Safety Microprocessor Malfunction	If a module is suspected, refer to the warranty policy and procedures manual.
C1A0048	Control module	Vehicle Stability Control Module Control Software Malfunction	Configure the module using an approved diagnostic system.
C1A0049	Control module	Vehicle Stability Control Module Internal Electronic Malfunction	If a module is suspected, refer to the warranty policy and procedures manual.
C1A004A	Control module	Incorrect vehicle stability control module component installed New modulator installed/configuration not yet set up	Configure the module using an approved diagnostic system.
C1A004B	Control module	Vehicle Stability Control Module Temperature High	Allow the module to cool, clear the DTC and retest. Do not replace the modulator as this is a safety feature to prevent damage to the valve. This DTC may be generated if the service diagnostic tool requests long periods of valve control.
C1A0062	Control module	Vehicle Stability Control Module Internal Malfunction	If a module is suspected, refer to the Warranty Policy and Procedures Guide.
C1A0063	Control module	Vehicle Stability Control Module Component Protection Time Exceeded	If a module is suspected, refer to the warranty policy and procedures manual.
C1A0064	Control module	Vehicle Stability Control Module Abnormal Signal	If a module is suspected, refer to the Warranty Policy and Procedures Guide.
C1A0068	Control module	Vehicle Stability Control Module Event Information	Check the steering angle sensor for incorrect adjustment and malfunction, the wheel speed sensor for malfunction, and the yaw/ lateral acceleration sensor for malfunction. Repair it if necessary. Delete the DTC codes and check again.
C1A0088	Control module	CAN bus is disabled Damage to the CAN bus wiring harness Incorrect identification information for configuration of main elements in CAN from instrument cluster	Refer to the "Network Communication" section in the service station manual.
C1A7601	Valve relay	Internal modulator failure	If a module is suspected, refer to the Warranty Policy and Procedures Guide.
C1A7604	Valve relay	Internal faults in the electrical circuit of the modulator valve relay	If a module is suspected, refer to the Warranty Policy and Procedures Guide.
C1A7716	Electrical power supply circuit of the valve relay	The voltage in the electrical circuit is below the threshold value. Fuse box Damage to the wiring harness/electrical connector	Refer to the electrical manuals and check the connections in the valve relay electrical circuits.
C1A7804	Left Front Inlet Valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A7809	Left Front Inlet Valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A7904	Left front exhaust valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8004	Right front intake valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8104	Right front exhaust valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8204	Left rear intake valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8209	Left rear intake valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8304	Left rear exhaust valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8404	Right rear intake valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8504	Right rear exhaust valve	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8604	Switching valve No.1	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8609	Switching valve No.1	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8704	Switching valve No.2	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8804	High pressure switching valve No.1	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A8904	High pressure switching valve #2	Internal modulator failure	If a module is suspected, refer to the warranty policy and procedures manual.
C1A9012	Wheel speed sensor power supply	Wheel speed sensor power supply circuit short to battery + Wiring harness/connector problem Sensor fault	Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9113	Left Front Wheel Speed Sensor	Wheel Speed Sensor Circuit High Resistance Wiring Harness/Electrical Connector Problem Sensor Malfunction	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9125	Left Front Wheel Speed Sensor	Waveform Failure Wiring Harness/Electrical Connector Problem Sensor Failure	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A912F	Left Front Wheel Speed Sensor	Erratic signal Problem with the wiring harness/electrical connector. Sensor malfunction	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9136	Left Front Wheel Speed Sensor	Signal frequency too low Problem with wiring harness/electrical connector Incorrect sensor installation Sensor failure	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9138	Left Front Wheel Speed Sensor	Incorrect signal frequency Missing and damaged teeth of the pulse wheel	Remove the sensor and visually inspect the constant velocity joint reluctor wheel for missing teeth or damaged teeth. If the sensor reluctor wheel is damaged, replace the CVJ. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful.
C1A9162	Left Front Wheel Speed Sensor	Signal matching error Incorrect size of wheels or tires installed Problem with wiring harness/electrical connector Sensor malfunction	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9164	Left Front Wheel Speed Sensor	No Signal Plausibility Problem with Wiring Harness/Electrical Connector Sensor Malfunction	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9165	Left Front Wheel Speed Sensor	Signal has too few transitions/events Sensor failure	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9178	Left Front Wheel Speed Sensor	Incorrect signal alignment Incorrect air gap of the sensor	Check the installation of the wheel speed sensor. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9213	Left rear wheel speed sensor	Wheel Speed Sensor Circuit High Resistance Wiring Harness/Electrical Connector Problem Sensor Malfunction	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9225	Left rear wheel speed sensor	Waveform Failure Wiring Harness/Electrical Connector Problem Sensor Failure	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A922F	Left rear wheel speed sensor	Erratic signal Problem with the wiring harness/electrical connector. Sensor malfunction	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9236	Left rear wheel speed sensor	Signal frequency too low. Wiring harness/electrical connector problem. Sensor failure.	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9238	Left rear wheel speed sensor	Incorrect signal frequency Missing or damaged teeth of the pulse wheel	Remove the sensor and visually inspect the constant velocity joint reluctor wheel for missing teeth or damaged teeth. If the sensor reluctor wheel is damaged, replace the CVJ. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful.
C1A9262	Left rear wheel speed sensor	Signal matching error Incorrect size of wheels or tires installed Problem with wiring harness/electrical connector Sensor malfunction	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9264	Left rear wheel speed sensor	No Signal Plausibility Problem with Wiring Harness/Electrical Connector Sensor Malfunction	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9265	Left rear wheel speed sensor	Signal has too few transitions/events Sensor failure	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9278	Left rear wheel speed sensor	Incorrect signal alignment Incorrect air gap of the sensor	Check the installation of the wheel speed sensor. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9313	Right rear wheel speed sensor	• Wheel Speed Sensor Circuit High Resistance Problem with wiring harness/electrical connector. Sensor malfunction	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9325	Right rear wheel speed sensor	Waveform Failure Wiring Harness/Electrical Connector Problem Sensor Failure	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A932F	Right rear wheel speed sensor	Erratic signal. Wiring harness/electrical connector problem. Sensor failure.	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9336	Right rear wheel speed sensor	Signal frequency too low. Wiring harness/electrical connector problem. Sensor failure.	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9338	Right rear wheel speed sensor	Incorrect signal frequency Missing or damaged teeth of the pulse wheel	Remove the sensor and visually inspect the constant velocity joint reluctor wheel for missing teeth or damaged teeth. If the sensor reluctor wheel is damaged, replace the CVJ. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful.
C1A9362	Right rear wheel speed sensor	Signal matching error Incorrect size of wheels or tires installed Problem with wiring harness/electrical connector Sensor malfunction	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9364	Right rear wheel speed sensor	No plausible signal. Wiring harness/electrical connector problem. Sensor failure.	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9365	Right rear wheel speed sensor	Signal has too few transitions/events Sensor failure	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9378	Right rear wheel speed sensor	Incorrect signal alignment Incorrect air gap of the sensor	Check the installation of the wheel speed sensor. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9413	Right Front Wheel Speed Sensor	Wheel Speed Sensor Circuit High Resistance Wiring Harness/Connector Problem Sensor Malfunction	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9425	Right Front Wheel Speed Sensor	Waveform Failure Wiring Harness/Electrical Connector Problem Sensor Failure	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A942F	Right Front Wheel Speed Sensor	Erratic signal. Wiring harness/electrical connector problem. Sensor failure.	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9436	Right Front Wheel Speed Sensor	Signal frequency too low. Wiring harness/electrical connector problem. Sensor failure.	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9438	Right Front Wheel Speed Sensor	Incorrect signal frequency Missing or damaged teeth of the pulse wheel	Remove the sensor and visually inspect the constant velocity joint reluctor wheel for missing teeth or damaged teeth. If the sensor reluctor wheel is damaged, replace the CVJ. Refer to the guided diagnostic routine for this code on the approved diagnostic system. Drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful.
C1A9462	Right Front Wheel Speed Sensor	Signal matching error. Incorrect size of wheels or tires installed. Problem with wiring harness/electrical connector. Sensor malfunction.	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9464	Right Front Wheel Speed Sensor	No plausible signal. Wiring harness/electrical connector problem. Sensor failure.	Check the wheel speed sensor and refer to the electrical manual to check the circuit. Test drive the vehicle at speeds greater than 20 km/h (12 mph) to verify the repair was successful. Refer to the guided diagnostic program for this code on the approved diagnostic system.
C1A9465	Right Front Wheel Speed Sensor	Signal has too few transitions/events Sensor failure	Check the wheel speed sensor and refer to the electrical guide to check the circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9478	Right Front Wheel Speed Sensor	Incorrect signal alignment Incorrect air gap of the sensor	Check the installation of the wheel speed sensor. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A954A	Wheel speed sensor	Incorrect installation of the wheel speed sensor	Check the wheel speed sensors. Clear the DTCs and retest.
C1A9562	Wheel speed sensor	Signal Matching Error Wheel Speed Sensor Rotation Characteristics	The wheel speed sensor is installed upside down. Check that the wheel speed sensor is installed correctly.
C1A9564	Wheel speed sensor	No plausible signal Wheel speed sensor faulty (any) Impulse wheel damaged, of the wrong type or defective Electrical wiring faulty Incorrect size of wheel and tire assembly	Check the wheels and tires for proper size. Check the wheel speed sensors and electrical circuits. Remove the sensor and visually inspect the constant velocity joint pulse wheel for missing teeth or damaged teeth. If the sensor pulse wheel is damaged, replace the CVJ. Replace the sensors if necessary. Refer to the appropriate section in the workshop manual.
C1A9613	Brake light switch	Brake Light Switch Circuit High Resistance Wiring Harness/Electrical Connector Problem	Check the operation of the brake lights. Refer to the electrical manuals and check the electrical circuit of the brake light switch, make the necessary repairs.
C1A9624	Brake light switch	Brake Light Switch Circuit Short to Battery + Wiring Harness/Electrical Connector Problem Brake light switch malfunction Incorrect installation of the brake light switch	Check the operation of the brake lights. Refer to the electrical manuals and check the electrical circuit of the brake light switch, make the necessary repairs.
C1A9662	Brake light switch	Signal comparison failure - incorrect switching order of the two poles of the brake light switch. Wiring harness/electrical connector problem Brake light switch malfunction	Check the operation of the brake lights. Refer to the electrical manuals and check the electrical circuit of the brake light switch, make the necessary repairs.
C1A9664	Brake light switch	No Signal Credibility. Wiring Harness/Electrical Connector Problem Brake light switch malfunction Internal Modulator Error	Check the brake lights for proper operation. Refer to the electrical manuals and check the brake light switch circuit, repair as necessary. If the switch and circuits are OK, suspect an internal modulator fault. If the module is suspected, refer to the warranty policy and procedures manual.
C1A9724	Transverse accelerometer	Signal Stuck at High Voltage Internal Yaw Rate/Lateral Acceleration Sensor Error	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9727	Transverse accelerometer	Rate of change of signal is above threshold. Harness/connector problem. Internal yaw rate/lateral acceleration sensor error.	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9728	Transverse accelerometer	Signal offset level out of range/internal error when setting "zero point" Internal error of yaw rate/lateral acceleration sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9729	Transverse accelerometer	Invalid Signal Internal Error of Yaw Rate/Lateral Acceleration Sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9749	Transverse accelerometer	Internal Electronic Malfunction Possible open circuit in the sensor wiring connector, pin aY Internal yaw rate/lateral acceleration sensor error	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9764	Transverse accelerometer	No Signal Plausibility Internal Error of Yaw Rate/Lateral Acceleration Sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9786	Transverse accelerometer	Invalid signal Electrical signal circuit - high resistance Electrical signal circuit - ground short circuit Electrical signal circuit - battery short circuit Internal yaw/ lateral acceleration sensor error	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9796	Transverse accelerometer	Internal Component Malfunction Internal Error of Yaw Rate/Lateral Acceleration Sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9801	Yaw rate sensor	General Electrical Fault Reference Electrical Circuit - High Resistance (dRSR pin) Reference electrical circuit - short circuit to ground (dRSR pin) Reference electrical circuit - short circuit to + battery (dRSR pin) Internal yaw rate/lateral acceleration sensor error	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9822	Yaw rate sensor	Signal amplitude greater than specified maximum value Internal yaw rate/lateral acceleration sensor error Steering wheel angle sensor not calibrated Defective steering wheel angle sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9827	Yaw rate sensor	Rate of change of signal is above threshold Internal yaw rate/lateral acceleration sensor error	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9828	Yaw rate sensor	Signal offset level out of range/internal error when setting "zero point" Internal error of yaw rate/lateral acceleration sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9829	Yaw rate sensor	Invalid Signal Internal Error of Yaw Rate/Lateral Acceleration Sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9861	Yaw rate sensor	Signal calculation failure Internal yaw rate/lateral acceleration sensor error Steering angle sensor not calibrated Defective steering angle sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9862	Yaw rate sensor	Signal Matching Error Internal Yaw Rate/Lateral Acceleration Sensor Error Uncalibrated Steering Angle Sensor Faulty Steering Angle Sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9864	Yaw rate sensor	No Signal Plausibility Internal yaw rate/lateral acceleration sensor error Steering wheel angle sensor not calibrated Defective steering wheel angle sensor	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9886	Yaw rate sensor	Invalid signal Signal circuit high resistance (dRSS pin) Electrical signal circuit - short circuit to ground (dRSS pin) Electrical signal circuit - short circuit to battery + (dRSS pin) Internal yaw rate/lateral acceleration sensor error	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1A9892	Yaw rate sensor	Performance issues or incorrect operation Make sure the sensor is correctly oriented Internal yaw rate/lateral acceleration sensor error	Check the installation of the combined yaw rate/lateral acceleration sensor. Refer to the electrical guides and check the yaw rate sensor circuit. Repair/replace as necessary. Refer to the appropriate section in the workshop manual. Refer to the guided diagnostic routine for this code on the approved diagnostic system. A road test is required before the instrument cluster lamps can be cleared.
C1A9901	Pressure sensor	General electrical fault Internal modulator error	Replace the ABS modulator. If the module is suspected, refer to the warranty policy and procedures manual.
C1A9929	Pressure sensor	Invalid signal Internal modulator error	Replace the ABS modulator. If the module is suspected, refer to the warranty policy and procedures manual.
C1A9949	Pressure sensor	Internal electronic fault Internal modulator error	Replace the ABS modulator. If the module is suspected, refer to the warranty policy and procedures manual.
C1A9964	Pressure sensor	Lack of signal plausibility Internal modulator error	Replace the ABS modulator. If the module is suspected, refer to the warranty policy and procedures manual.
C1B0027	Steering wheel angle sensor	Rate of change of signal is above threshold Uncalibrated steering angle sensor Problem related to steering angle sensor	Check for DTCs for the steering angle sensor. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0029	Steering wheel angle sensor	Invalid signal Uncalibrated steering angle sensor Steering angle sensor related problem	Check for DTCs for the steering angle sensor. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0061	Steering wheel angle sensor	Signal calculation failure Steering angle sensor not calibrated Steering angle sensor related problem	Check for DTCs for the steering angle sensor. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0064	Steering wheel angle sensor	No Signal Plausibility Uncalibrated Steering Angle Sensor Steering Angle Sensor Problem	Check for DTCs for the steering angle sensor. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0092	Steering wheel angle sensor	Performance issues or incorrect operation Steering angle sensor not calibrated Steering angle sensor related problem	Check for DTCs for the steering angle sensor. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
C1B0201	Return pump	Return Pump Electrical Circuit - General Electrical Malfunction Internal Modulator Error	Replace the ABS modulator. If the module is suspected, refer to the warranty policy and procedures manual.
C1B0216	Return pump	Return pump electrical circuit - voltage below threshold Damaged wiring harness Faulty fuse	Refer to the electrical manuals, check the wiring harness and module fuses, and make any necessary repairs.
C1B0249	Return pump	Internal electronic fault Internal modulator error	Replace the ABS modulator. If the module is suspected, refer to the warranty policy and procedures manual.
C1B2224	Controlled Descent Switch	Signal Stuck at High Voltage If the HDC switch is pressed for more than 1 minute, a DTC may be stored. Harness/Electrical Connector Problem	Refer to the electrical equipment manuals and check the switch and electrical circuit for a short circuit on the battery side. Check the operation of the HDC switch and repair/ replace it if necessary.
U010087	Lost Communication with ECM/PCM "A"	CAN bus failure ECM is disconnected ECM configuration not set ECM failure Problem with wiring harness/electrical connector	Check the ECM installation/configuration. Refer to the Network Communications section in the workshop manual.
U010187	Lost connection with TCM	CAN bus failure TCM is disconnected TCM module configuration not set TCM malfunction Problem with wiring harness/electrical connector	Check the TCM installation/configuration. Refer to the Network Communications section in the workshop manual.
U010287	Lost Communication with Transfer Case Control Module	CAN bus failure TCCM is disconnected TCCM module configuration is not configured TCCM malfunction Problem with wiring harness/electrical connector	Check the TCCM installation/configuration. Refer to the Network Communications section in the Service Station Manual.
U010487	Lost Communication with Cruise Control Module	CAN bus failure Cruise control module disconnected Cruise control module configuration not set Cruise control module malfunction Problem with wiring harness/electrical connector	Check the installation/configuration of the control module. Refer to the "Network Communication" section in the service station manual.
U012687	Lost Communication with Steering Angle Sensor Module	CAN bus failure Disconnecting the steering wheel angle sensor module Steering Angle Sensor Module Configuration Not Configured Steering Angle Sensor Module Malfunction Problem with wiring harness/electrical connector	Check the installation/configuration of the control module. Refer to the "Network Communication" section in the service station manual.
U012887	Lost Communication with Parking Brake Control Module	CAN bus failure PBM is disconnected PBM configuration is not set up PBM failure Problem with wiring harness/electrical connector	Check the installation/configuration of the control module. Refer to the "Network Communication" section in the service station manual.
U013287	Lost Communication with Suspension Control Module "A"	CAN bus failure RLM is disconnected RLM configuration is not configured RLM failure Problem with wiring harness/electrical connector	Check the installation/configuration of the control module. Refer to the "Network Communication" section in the service station manual.
U013387	Lost communication with active roll control module	CAN bus failure ARC is disconnected ARC module configuration is not configured ARC malfunction Problem with wiring harness/electrical connector	Check the installation/configuration of the control module. Refer to the "Network Communication" section in the service station manual.
U013687	Lost Communication with Rear Differential Control Module	CAN bus failure RDCM is disconnected RDCM module configuration is not configured RDCM failure Problem with wiring harness/electrical connector	Check the installation/configuration of the control module. Refer to the "Network Communication" section in the service station manual.
U013887	Lost communication with the terrain response system control module	CAN bus failure ATCM is disconnected ATCM module configuration is not set ATCM Malfunction Problem with wiring harness/electrical connector	Check the installation/configuration of the control module. Refer to the "Network Communication" section in the service station manual.
U015587	Lost Communication with Instrument Panel Control (IPC) Module	CAN bus failure IPC disconnected IPC configuration is not configured IPC failure Problem with wiring harness/electrical connector	Check the installation/configuration of the control module. Refer to the "Network Communication" section in the service station manual.
U040168	Invalid data received from ECM/PCM A	Event Information	Check for engine management related DTCs Refer to the appropriate section in the service manual.
U040268	Invalid data received from TCM	Event Information	Check for transmission related DTCs Refer to the appropriate section in the service manual.
U040368	Invalid data received from transfer case control module	Event Information	Check for transfer case related DTCs Refer to the appropriate section in the service manual.
U040568	Invalid data received from cruise control module	Event Information	Check for cruise control related DTCs Refer to the appropriate section in the service manual.
U041768	Invalid data received from the parking brake control module	Event Information	Check for parking brake related DTCs Refer to the appropriate section in the workshop manual.
U042168	Invalid data received from suspension control module "A"	Event Information	Check for dynamic suspension related DTCs Refer to the appropriate section in the workshop manual.
U042468	Invalid data received from HVAC control module	Event Information	Ignore this DTC.
U042868	Invalid data received from steering wheel angle sensor module	Event Information	Check the steering angle sensor and electrical circuits. Refer to the electrical manual. Test the vehicle on roads that require steering input changes to verify the repair was successful.
U1A4968	Invalid data received from terrain response system control module	Event Information	Check for Terrain Response System DTCs. Refer to the appropriate section in your service manual.
U1A4A68	Invalid data received from rear differential control module	Event Information	Check for RDCM DTCs Refer to the appropriate section in the service manual.
U200168	Reduced system performance	Event Information Not a malfunction. The system has "frozen" while the system is cooling down. The customer may see the indicator light illuminated during the period of reduced performance or may notice the vehicle is behaving differently than when the traction control is in operation.	This event occurs when the ECU reduces functionality to prevent the service brakes from overheating. This is normal ECU operation and is not a malfunction. Clear/ignore this DTC.