Trouble Code Definition
ECM/PCM TROUBLE CODE DEFINITION
| Code No. | Circuit Affected |
|---|---|
| 13 | Open Oxygen (O2) Sensor Circuit |
| 14 | CTS Signal Voltage Low |
| 15 | CTS Signal Voltage High |
| 21 | TPS Signal Voltage High |
| 22 | TPS Signal Voltage Low |
| 23 | MAT Sensor Signal Voltage High |
| 24 | Vehicle Speed Sensor Circuit |
| 25 | MAT Sensor Signal Voltage Low |
| 32 | EGR System Error |
| 33 | MAP Sensor Signal Voltage High |
| 34 | MAP Sensor Signal Voltage Low |
| 35 | IAC Idle Speed Error |
| 42 | EST Circuit Open Or Grounded |
| 43 | ESC Error |
| 44 | Lean Exhaust Indication |
| 45 | Rich Exhaust Indication |
| 51 | Faulty PROM, MEM-CAL Or ECM/PCM |
| 52 | Faulty/Missing CAL-PAC Or MEM-CAL |
| 54 | Fuel Pump Voltage Low |
| 55 | ECM/PCM Error |
| 66 | A/C Pressure Sensor Circuit |
NOTE:
Use trouble code charts only if SERVICE ENGINE SOON light is illuminated (indicating a current problem exists). Exceptions are Code 13, 15, 24, 44 and 45 charts, which may be used to help diagnose intermittent codes. Anytime control module-related Codes 51, 52 or 55 are displayed with another code, start with 50-series code, and then proceed to lower numbered codes.