Scantool Diagnostics

Engine Control
P0138 O2 Sensor Circuit High Voltage (Bank 1 / Sensor 2) - Scantool Diagnostics

Monitor GDS Data

1. Connect GDS to DLC (Data Link Cable).
2. Warm up the engine to normal operating temperature.
3. Monitor "HO2S(S2)" parameter on GDS.




4. Is the "HO2S(S2)" parameter operating correctly ?






NOTE:
This DTC might be caused by the malfunction of Heater circuit, so, check the heater circuit first.