Possible Causes
WARNING: This page is about a different car, the 2002 Mazda Tribute. 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.
- Mass Airflow/Intake Air Temperature (MAF/IAT) sensor.
- Deteriorating HO2S.
- Intake air leaks.