P0138

DTC P0137 / P0138: O2 Sensor Circuit Low Voltage / High Voltage (Sensor-2, Bank-1)

System And Wiring Diagram:

Wiring Diagram

NOTE:
When DTC P0138 and P0158 are indicated together, it is possible that HO2S ground circuit (GRN ) wire is open.
When DTC P0138, P0158, P0107, P0113, P0118 and P0553 are indicated together, it is possible that sensor ground circuit (GRY/GRN ) wire is open.

DTC Detecting Condition And Trouble Area:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

NOTE:
Check to make sure that following conditions are satisfied when using this "DTC Confirmation Procedure".
- The following DTC is not detected: HO2S heater (when troubleshooting for DTC P0137).

1. With ignition switch OFF, connect scan tool to DLC.
2. Turn ON ignition switch and clear DTC.
3. Start engine and warm up to normal operating temperature.
4. Run engine at idle speed for 1 min. or more.
5. Check DTC and pending DTC.

Step 1-3 (Continued):

Step 3 (Continued)-4:

DTC Troubleshooting

NOTE: Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to Precautions for DTC Troubleshooting.