Possible Causes
| Possible Causes |
|---|
| Egr Control 1 Circuit Open/High Resistance |
| Egr Control 2 Circuit Open/High Resistance |
| Egr Control 1 Circuit Shorted To Voltage |
| Egr Control 2 Circuit Shorted To Voltage |
| Egr Valve Assembly |
| Powertrain Control Module |
Always Perform The Pre-Diagnostic Troubleshooting Procedure Before Proceeding. Refer To PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .