Potential Causes:
* Faulty HO2S
* Faulty wiring or connector to the HO2S
* Exhaust leak near the HO2S
* Faulty PCM
* Faulty ground connection
Diagnostic and Repair:
1. Check for exhaust leaks around the HO2S. Repair any leaks if found.
2. Check the wiring and connector to the HO2S. Repair or replace any damaged wiring or connectors.
3. Check the ground connection for the HO2S. Make sure it is clean and tight.
4. If the above steps do not fix the problem, the HO2S or the PCM may be faulty. Replace the faulty component as necessary.
Tip:
* It is important to use a scan tool to monitor the HO2S signals when diagnosing this code. This will help to identify the faulty component.
