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:
- Contaminated HO2S.
- Exhaust leaks.
- Shorted or open wires.
- Improper fueling.
- MAF sensor.
- Deteriorating HO2S.
- Intake air leaks.