Fault Codes
NOTE:
Codes listed in FAULT CODES table are not used on all vehicles. For testing procedures, see DIAGNOSTIC TESTS.
NOTE:
If MIL stays on, ECM may be faulty.
FAULT CODES
| Code | Description | Possible Cause |
|---|---|---|
| 11 | Heated Oxygen Sensor (HO2S) Malfunction | Faulty HO2S, Connector Or Harness, Incorrect Fuel Pressure, Defective Injector(s), Or Intake Air Leaks |
| 12 | Airflow Sensor Malfunction | Faulty Airflow Sensor, Connector, Or Harness |
| 13 | Intake Air Temperature (IAT) Sensor Malfunction | Faulty IAT Sensor, Connector, Or Harness |
| 14 | Throttle Position (TP) Sensor Malfunction | Faulty TP Sensor, Connector, Wiring, Or TP Switch |
| 15 | Idle Speed Control (ISC) Motor Position Sensor Malfunction | Faulty ISC Motor Position Sensor Or Faulty Throttle Position Sensor, Connector, Or Harness |
| 21 | Coolant Temperature Sensor (CTS) Malfunction | Faulty CTS, Connector, Or Harness |
| 22 | Crankshaft Position (CKP) Sensor Malfunction | Faulty Distributor (If Equipped) Or Faulty CKP Sensor, Connector, Or Harness |
| 23 | Top Dead Center (TDC) Sensor Malfunction | Faulty TDC Sensor, Connector, Or Harness |
| 24 | Vehicle Speed Sensor (VSS) Malfunction | Faulty VSS, Connector, Or Harness |
| 25 | Barometric Pressure (BARO) Sensor Malfunction | Faulty BARO Pressure Sensor, Connector, Or Harness |
| 41 | Fuel Injector Malfunction | Low Or High Injector Coil Resistance, Connector, Or Harness |
| 42 | Fuel Pump Malfunction | Faulty ECM Or Faulty MFI Relay Connector Or Harness |
| 43 | EGR Temperature Sensor Malfunction | Faulty EGR Valve, EGR Temperature Sensor, EGR Solenoid, Or EGR Vacuum Control Connector Or Harness |
| 44 | Ignition Coil/Power Transistor Malfunction | Faulty Ignition Coil Or Faulty Ignition Power Transistor Unit Connector Or Harness |
| 59 | Heated Oxygen Sensor (HO2S) Malfunction | Faulty HO2S, Connector Or Harness, Incorrect Fuel Pressure, Defective Injector(s), Or Intake Air Leaks |