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 the maximum and minimum voltage from the sensor are beyond the specified voltages. Possible causes are:
- Defective HO2S1.
- Defective HO2S1 heater.
- Fuel pressure incorrect.
- Defective injectors.