Trouble Code Identification
TROUBLE CODE IDENTIFICATION
| Code |
System/Affected Circuit |
Possible Cause/Repair |
| 1111 |
Electronic Control Module |
Replace Faulty ECM |
| 1231 |
Vehicle Speed Sensor |
Open Ckt (No Signal To ECM) |
| 2112 |
Ignition Reference Sensor |
Open Or Faulty Sensor |
| 2113 |
Hall Effect Sensor |
Open/Short Ckt To |
| " |
" |
Ground Or Battery Voltage |
| 2121 |
Idle Switch |
Open Ckt Or Short, Switch Faulty |
| 2123 |
Full-throttle Switch |
Open Ckt Or Short, Switch Faulty |
| 2141 |
Knock Sensor (Primary) |
Defective Knock Sensor |
| " |
" |
In ECM (Replace ECM) |
| 2142 |
Knock Sensor I |
Open/Short Ckt To |
| " |
" |
Ground Or Battery Voltage |
| 2144 |
Knock Sensor II |
Open/Short Ckt To |
| " |
" |
Ground Or Battery Voltage |
| 2231 |
Idle Speed Regulation |
Intake System Leaks, EGR Valve |
| " |
" |
Or IAC Valve Malfunction |
| 2232 |
Air Flow Sensor Potentiometer |
Open Ckt Or Short To |
| " |
" |
Ground, Potentiometer Faulty |
| 2312 |
Coolant Temp. Sensor |
Open/Short Ckt To |
| " |
" |
Ground Or Battery Voltage |
| 2341 |
O2 Sensor Control |
Limit Exceeded/Not Reached |
| 2342 |
O2 Sensor (Heated) |
Open/Short Ckt To |
| " |
" |
Ground Or Battery Voltage |
| 2411 |
EGR Temp. Sensor |
Short Ckt To Ground Sensor Faulty |
| 4431 |
Idle Air Control Valve |
Open/Short Ckt To |
| " |
" |
Ground Or Battery Voltage |
| 4444 |
No Fault |
Verify Correct ECM Is Installed |