Trouble Code Definitions
FAULT CODE IDENTIFICATION
| Code |
Circuit Affected |
Probable Cause |
| 12 |
No RPM Signal |
No Signal |
| 13 |
No RPM Signal |
No Signal |
| 14 |
Ignition Signal |
No Signal |
| 16 |
PCM Control Signal |
PCM Failure |
| 21 |
Oxygen Sensor |
Open/Short Circuit |
| 22 |
Coolant Temp. Sensor |
Open/Short Circuit |
| 24 |
Intake Air Temp. Sensor |
Open/Short Circuit |
| 25 |
Oxygen Sensor |
Lean Exhaust Indicated |
| 26 |
Oxygen Sensor |
Rich Exhaust Indicated |
| 27 |
Sub-O2 Sensor |
Open/Short Circuit |
| 31 |
MAP Sensor |
Open/Short Circuit |
| 41 |
Throttle Position Sensor |
Open/Short Circuit |
| 42 |
Vehicle Speed Sensor |
Incorrect Signal Voltage |
| 43 |
Crank Signal |
No Signal |
| 51 |
Switch Condition Signal |
No Signal Present |
| 52 |
Knock Sensor Signal |
Open/Short Circuit |
| 71 |
EGR Temp. Sensor |
Out Of Calibration |