Possible Causes
| Possible Causes |
|---|
| HIGH RESISTANCE IN THE 5-VOLT SUPPLY CIRCUIT |
| HIGH RESISTANCE IN THE EGR SIGNAL CIRCUIT |
| HIGH RESISTANCE IN THE SENSOR GROUND CIRCUIT |
| EGR VALVE ASSEMBLY |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .