Possible Causes
WARNING: This page is about a different car, the 2003 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
DTC P2195 will set when A/F sensor voltage is more than 3.8 volts for 10 seconds or more. DTC P2196 will set when A/F sensor voltage is less than 2.8 volts for 10 seconds or more. Possible causes are:
- A/F sensor circuit is open or shorted.
- Defective A/F sensor.
- Defective A/F sensor heater.
- Air induction system malfunction.
- Improper fuel pressure.
- Defective fuel injector.
- Defective EFI main relay.
- Defective ECM.