Inspection and verification
1. Make sure the customer's complaint is valid.
2. Visually inspect for obvious signs of mechanical damage.
Mechanical factors |
3. If an obvious cause of a problem you identified or described by a customer is found, resolve it before proceeding to the next steps (if possible).
Symptom table
Symptom | Possible reasons | Action |
Noise or leaks in the exhaust system | Exhaust system / system elements | Install new elements if necessary. Refer to the relevant section in the workshop manual. |
Insufficient power | Check the air intake system. Check muffler or catalytic converter for blockage, install new as required. Check the pressure in the fuel system. Checks of the EGR system and turbocharger are described in the relevant sections of the workshop manual. |
DTC index
NOTE: Universal Scan Tools cannot read the listed codes 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 problem (the last 2 digits give additional information read by the diagnostic system approved by the manufacturer).
NOTE: See Section 303-14 for a complete list of ECM DTCs "Electronic engine management system" in the workshop manual.
DTC | Description | Possible reasons | Action |
P003100 | Low Voltage Heated Oxygen Sensor Heater Control Circuit (row 1, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P003200 | High Voltage Heated Oxygen Sensor Heater Control Circuit (row 1, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P003600 | Heated oxygen sensor heater control circuit (row 1, sensor 2) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P005100 | Low Voltage Heated Oxygen Sensor Heater Control Circuit (row 2, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P005200 | High Voltage Heated Oxygen Sensor Heater Control Circuit (row 2, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P005600 | Heated oxygen sensor heater control circuit (row 2, sensor 2) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P01301A | Electrical circuit O2 (row 1, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P01301B | Electrical circuit O2 (row 1, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P013100 | Low voltage in the electrical circuit O2 (row 1, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P013200 | High voltage in the electrical circuit O2 (row 1, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P013300 | Slow response electrical circuit O2 (row 1, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P013400 | No activity in the O2 electrical circuit (row 1, sensor 1) | Heated oxygen sensor (right bank of cylinders): slow start | Refer to the guided diagnostic program for this code on the approved diagnostic system. |
P013700 | Low voltage in the electrical circuit O2 (row 1, sensor 2) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P013800 | High voltage in the electrical circuit O2 (row 1, sensor 2) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P013900 | Slow response electrical circuit O2 (row 1, sensor 2) | Catalytic converter monitoring sensor (right bank of cylinders): slow response | Refer to the guided diagnostic program for this code on the approved diagnostic system. |
P014000 | No activity in the O2 electrical circuit (row 1, sensor 2) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P014100 | O2 heater circuit (row 1, sensor 2) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P01501A | Electrical circuit O2 (row 2, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P01501B | Electrical circuit O2 (row 2, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P015100 | Low voltage in the electrical circuit O2 (row 2, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P015200 | High voltage in the electrical circuit O2 (row 2, sensor 1) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P015300 | Slow response electrical circuit O2 (row 2, sensor 1) | Check the exhaust system for leaks. Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P015400 | No activity in the O2 electrical circuit (row 2, sensor 1) | Heated oxygen sensor (left bank of cylinders): slow start | Check HO2S and electrical circuits. Refer to the electrical manual. Refer to the guided diagnostic program for this code on the approved diagnostic system. |
P015700 | Low voltage in the electrical circuit O2 (row 2, sensor 2) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P015800 | High voltage in the electrical circuit O2 (row 2, sensor 2) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P015900 | Slow response electrical circuit O2 (row 2, sensor 2) | Catalytic converter monitoring sensor (left bank of cylinders): slow response | Refer to the guided diagnostic program for this code on the approved diagnostic system. |
P016000 | No activity in the O2 electrical circuit (row 2, sensor 2) | Refer to the guided diagnostic program for this code on the approved diagnostic system. | |
P016100 | O2 heater circuit (row 2, sensor 2) | Catalytic converter monitoring sensor heater control circuit (left bank of cylinders) - refusal | Refer to the guided diagnostic program for this code on the approved diagnostic system. |
P042000 | Catalytic Converter System Efficiency Below Threshold (cylinder bank 1) | Check the condition of the catalytic converter. | |
P043000 | Catalytic Converter System Efficiency Below Threshold (cylinder bank 2) | Check the condition of the catalytic converter. |
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