Trouble Code Definition
ECM/PCM TROUBLE CODE DEFINITION
| Code No. |
Circuit Affected |
| 12 |
No RPM Reference Pulse |
| 13 |
Open Oxygen Sensor Circuit |
| 14 |
CTS Signal Voltage Low |
| 15 |
CTS Signal Voltage High |
| 16 |
System 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 |
| 26 |
Quad-Driver Error |
| 33 |
MAP Sensor Signal Voltage High |
| 34 |
MAF Sensor Signal Voltage Low |
| 35 |
IAC Idle Speed Error |
| 36 |
Trans. Shift Circuit |
| 38 |
Brake Switch |
| 39 |
TCC |
| 41 |
Cam Sensor Loss |
| 42 |
EST Circuit Open Or Grounded |
| 43 |
ESC Error |
| 47 |
PCM-BCM Data Loss |
| 48 |
Misfire Diagnosis |
| 51 |
Faulty PROM, MEM-CAL or ECM/PCM |
| 52 |
Faulty/Missing CALPAC or MEM-CAL |
| 58 |
Anti-Theft System Fault |
| 61 |
Cruise Vent Solenoid |
| 62 |
Cruise Vacuum Solenoid |
| 65 |
Cruise servo position |
| 66 |
Low A/C Refrigerant Charge |
| 67 |
Cruise Engage Switches |
| 68 |
Cruise System Problem |
NOTE:
Trouble code charts should only be used 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 first, then proceed to low profile numbered codes.