Possible Causes
WARNING: This page is about a different car, the 2003 Mazda MPV and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
- EGR boost sensor malfunction.
- EGR boost sensor solenoid malfunction.
- PCM malfunction.
- Vacuum hose loose, damaged, misconnected or clogged between EGR boost sensor and EGR boost sensor solenoid or between EGR boost sensor solenoid and EGR valve.