Possible Causes
WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
Malfunction is detected when an excessively high voltage from HO2S1 is sent to ECM. Possible causes are:
- HO2S1 circuit open or shorted.
- Defective HO2S1.