Possible Causes
| Possible Causes |
|---|
| 5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED |
| EGR VALVE POSITION SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| EGR VALVE POSITION SENSOR SIGNAL CIRCUIT OPEN/HIGH RESISTANCE |
| SENSOR GROUND CIRCUIT OPEN/HIGH RESISTANCE |
| EGR VALVE ASSEMBLY |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .