Component Inspection

Engine Control
P0138 O2 Sensor Circuit High Voltage (Bank 1 / Sensor 2) - Inspection/Repair:_:Component Inspection

Component Inspection

Check the Signal waveform of HO2S
1. IG "OFF" and connect HO2S connector.
2. Engine start.
3. After warming-up, monitor signal waveform of HO2S with GDS.




4. Is the sensor switching properly ?





Check HO2S
1. IG "OFF" and disconnect HO2S connector.
2. Check that the HO2S is securely installed.
3. Check the HO2S for contamination or damage
4. Is the sensor normal ?