TROUBLE CODE IDENTIFICATION
Note. Trouble codes retrieved from PCM may be either engine or transmission related. Only engine related DTCs are covered in this article. For transmission related DTCs, see the AUTO TRANS DIAGNOSIS article in the AUTOMATIC TRANSMISSION section. See DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION table to determine if DTC is engine or transmission related.
- The DTCs indicate failure of a specific sensor and/or circuit. Sensor/circuit diagnosis may indicate replacement of PCM.
- If PCM is replaced at any point during diagnostic testing and if condition is still not corrected after replacing PCM, the following may be the cause: An incorrect PCM may cause a malfunction, which may or may not set a DTC. The PCM connector may be the problem. Connector terminals may have to be removed from connector to be properly checked. Replacement PCM may be faulty. Intermittent problem. Make a careful physical inspection of affected sensor/circuit. A shorted solenoid, coil relay, or harness may be the cause of PCM failure. Use Short Circuit Tester (J-34636) to check for short circuits.
| DTC | Probable Cause |
|---|---|
| P0101 (1) | MAF System Performance |
| P0102 (1) | MAF Sensor Circuit Low Frequency |
| P0103 (1) | MAF Sensor Circuit High Frequency |
| P0112 (1) | IAT Sensor Circuit Low Voltage |
| P0113 (1) | IAT Sensor Circuit High Voltage |
| P0117 (1) | ECT Sensor Circuit Low Voltage |
| P0118 (1) | ECT Sensor Circuit High Voltage |
| P0121 (1) | APP Sensor 1 Circuit Performance |
| P0122 (1) | APP Sensor 1 Circuit Low Voltage |
| P0123 (1) | APP Sensor 1 Circuit High Voltage |
| P0126 (1) | Insufficient ECT For Stable Operation |
| P0182 (1) | Fuel Temperature Sensor Circuit Low Voltage |
| P0183 (1) | Fuel Temperature Sensor Circuit High Voltage |
| P0215 (1) | Engine Shutoff Solenoid Control Circuit |
| P0216 (1) | Injection Timing Control System |
| P0218 (2) | Transmission Fluid Overtemperature |
| P0219 (1) | Engine Overspeed Condition |
| P0220 (1) | APP Sensor 2 Circuit |
| P0221 (1) | APP Sensor 2 Circuit Performance |
| P0222 (1) | APP Sensor 2 Circuit Low Voltage |
| P0223 (1) | APP Sensor 2 Circuit High Voltage |
| P0225 (1) | APP Sensor 3 Circuit |
| P0226 (1) | APP Sensor 3 Circuit Performance |
| P0227 (1) | APP Sensor 3 Circuit Low Voltage |
| P0228 (1) | APP Sensor 3 Circuit High Voltage |
| P0231 (1) | Fuel/Lift Pump Feedback Circuit Low Voltage |
| P0236 (1) | Turbocharger Boost System |
| P0237 (1) | Turbocharger Boost Sensor Circuit Low Voltage |
| P0238 (1) | Turbocharger Boost Sensor Circuit High Voltage |
| P0251 (1) | Injection Pump Cam System |
| P0263 (1) | Cylinder No. 1 Balance System |
| P0266 (1) | Cylinder No. 2 Balance System |
| P0269 (1) | Cylinder No. 3 Balance System |
| P0272 (1) | Cylinder No. 4 Balance System |
| P0275 (1) | Cylinder No. 5 Balance System |
| P0278 (1) | Cylinder No. 6 Balance System |
| P0281 (1) | Cylinder No. 7 Balance System |
| P0284 (1) | Cylinder No. 8 Balance System |
| P0335 (1) | CKP Sensor Circuit Performance |
| P0370 (1) | Timing Reference High Resolution |
| P0380 (1) | Glow Plug Circuit Performance |
| P0400 (1) | EGR Flow Malfunction |
| P0401 (1) | EGR Flow Insufficient |
| P0402 (1) | EGR Flow Excessive |
| P0404 (1) | EGR Flow Performance |
| P0405 (1) | EGR Sensor Circuit Low Voltage |
| P0406 (1) | EGR Sensor Circuit High Voltage |
| P0501 (1) | Vehicle Speed Sensor Circuit |
| P0560 (2) | System Voltage Malfunction |
| P0567 (1) | Cruise Resume Circuit |
| P0568 (1) | Cruise Set Circuit |
| P0571 (1) | Cruise Brake Switch Circuit |
| P0601 (1) | PCM Memory |
| P0602 (1) | PCM Not Programmed |
| P0604 (1) | Control Module Random Access Memory |
| P0606 (1) | PCM Internal Communication Interrupted |
| P0711 (2) | TFT Sensor Circuit - Range/Performance |
| P0712 (2) | TFT Sensor Circuit - Low Input |
| P0713 (2) | TFT Sensor Circuit - High Input |
| P0716 (2) | Input Speed Sensor Circuit - Range/Performance |
| P0717 (2) | Input Speed Sensor Circuit - No Signal |
| P0719 (2) | Brake Switch Circuit - Low Input |
| P0722 (2) | Output Speed Sensor - Low Input |
| P0723 (2) | Output Speed Sensor - Intermittent |
| P0724 (2) | Brake Switch Circuit - High Input |
| P0741 (2) | TCC Stuck Off |
| P0742 (2) | TCC Stuck On |
| P0748 (2) | PCS Circuit - Electrical |
| P0751 (2) | 1-2 Shift Solenoid - Performance |
| P0753 (2) | 1-2 Shift Solenoid - Electrical |
| P0756 (2) | 2-3 Shift Solenoid - Performance |
| P0758 (2) | 2-3 Shift Solenoid - Electrical |
| P1125 (1) | APP System |
| P1191 (1) | Intake Air Duct Leak |
| P1214 (1) | Injection Pump Timing Offset Error |
| P1216 (1) | Fuel Solenoid Response Time Too Short |
| P1217 (1) | Fuel Solenoid Response Time Too Long |
| P1218 (1) | Injection Pump Calibration Circuit |
| P1406 (1) | EGR Valve Position |
| P1409 (1) | EGR Vacuum System Leak |
| P1621 (1) | EEPROM Write |
| P1627 (1) | A/D Performance |
| P1635 (1) | PCM 5-Volt Reference Low |
| P1641 (1) | MIL Control Circuit |
| P1643 (1) | WAIT TO START Light Control Circuit |
| P1653 (1) | EGR Vent Solenoid Control Circuit |
| P1654 (1) | SERVICE THROTTLE SOON Light Control Circuit |
| P1655 (1) | EGR Solenoid Control Circuit |
| P1656 (1) | Wastegate Solenoid Control Circuit |
| P1810 (2) | Fluid Press. Manual Valve Position Switch |
| P1811 (2) | Maximum Adapt Long Shift |
| P1860 (2) | TCC PWM Solenoid Circuit - Electrical |
| P1870 (2) | Transmission Component Slipping |
| P1871 (2) | Undefined Gear Ratio |
| P1875 (2) | 4WD Low Switch - Input Malfunction |
| (1) Code is engine related. (2) Code is transmission related. For transmission related codes, see the appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS. | |
| (1) | Code is engine related. |
| (2) | Code is transmission related. For transmission related codes, see the appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS. |
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
CONNECTOR IDENTIFICATION
Note. For additional connector and terminal identification, see CONNECTOR IDENTIFICATION - C/K SERIES article.
