Component Inspection
- With ignition "OFF", reconnect the HO2S connector.
- Warm up the engine to normal operating temperature and let it idle.
- Connect GDS and monitor the HO2S SNSR VOL.-B1/S2 parameter on the GDS data list.
Specification : Above 0.7V at idle
- Is sensor data near the specified value?
YES
- Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.