Component Inspection
- With ignition "OFF" reconnect the HO2S connector.
- Warm up the engine to normal operating temperature and let it idle.
- Connect scan tool and monitor the O2 SNSR VOL.-B1/S2 parameter on the scan tool data list.
Specification: Above 0.7V at idle
- Is sensor data near the specified value?
YES
- Check for poor connection between ECM 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.