Heated Oxygen Sensor (HO2S) On-Vehicle Inspection: Ho2S
- Check that HO2S signal is outputted properly. See INSPECTION OF ECM AND ITS CIRCUITS
.
If faulty condition is found, check the following.
- Wire harness and connections
- Exhaust system leakage
If check result is good, replace faulty HO2S. See HEATED OXYGEN SENSOR (HO2S) REMOVAL AND INSTALLATION .