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.
- Faulty left front HO2S.
- Open between ignition switch and left front HO2S.
- Open or short between left front HO2S and PCM.
- PCM malfunction.