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.
DTC P0031
- Open or short in heater circuit of A/F sensor.
- Defective A/F sensor heater.
- Defective EFI relay.
- Defective EFI fuse.
- Defective ECM.
DTC P0032
- Short in heater circuit of A/F sensor.
- Defective A/F sensor heater.
- Defective ECM.