Possible Causes
WARNING: This page is about a different car, the 2003 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
- Open or short in A/F sensor circuit.
- Defective A/F sensor.
- Defective A/F sensor heater.
- Defective EFI relay.
- Defective A/F sensor and EFI relay circuit.
- Defective air induction system.
- Defective fuel pressure.
- Defective injector.
- Defective positive crankcase ventilation (PCV) hose connection.
- Defective ECM.