Possible Causes
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- Upstream or downstream pressure hose disconnected or improperly connected.
- Upstream or downstream pressure hose plugged (by ice).
- Plugged or damaged pressure pickup tubes.
- Damaged DPFEGR sensor.