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P0138

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P0138 OBD-II Trouble Codes: O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)
P0138 code definition O2 Sensor Circuit High Voltage (Bank 1, Sensor 2) What the P0138 code means P0138 is the OBD-II generic code indicating the O2 sensor for bank 1 sensor...

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Question
Getting a check engine light, P0138 error: "O2 Sensor circuit High voltage (Bank 1, sensor 2)"
Hi, thanks for writing in. I wouldn't worry about it. The only purpose of the downstream O2 sensor is to monitor the health of the catalytic converter. You have four O2 sensors. The two upstream sensors monitor fuel mixture (Bank...
Question
Code 0132 and 0138
Hello. Codes like these can be tricky, because they give us a warning that the voltage readings are out of range, but they do not tell you why. The high voltage reading is showing that the air/fuel mixture being processed...

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