Possible Causes
| Possible Causes |
|---|
| EXCESSIVE RESISTANCE IN THE (F856) 5-VOLT SUPPLY CIRCUIT |
| (K35) EGR SOLENOID CONTROL CIRCUIT OPEN |
| (K34) EGR SENSOR SIGNAL CIRCUIT SHORTED TO GROUND |
| (Z958) GROUND CIRCUIT OPEN |
| EGR SOLENOID ASSEMBLY |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .