Possible Causes
WARNING: This page is about a different car, the 2002 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- EGR valve stuck open.
- EGRVR circuit shorted to ground.
- Damaged EGRVR solenoid.
- Damaged PCM.
- Plugged EGRVR solenoid vent.
- Plugged EGR tube.
- Slow responding DPFEGR sensor.
- Damaged DPFEGR sensor.
- Improper vacuum hose connection.
- Plugged vacuum hoses.