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 Right/Front HO2S.
- PCM malfunction.
- Short to power between right front HO2S and PCM.
- Short at right front HO2S or PCM harness connector terminals.