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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...

Related questions

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...
Question
Why is it still misfiring?
Hi there. Check the Exhaust Gas Recirculation valve on the engine. It seems to be sticking on when the engine is running at low idle and causing a misfire as the old exhaust that is burnt is reentering the engine....
Question
Help! P0138 came back after I put engine cleaner in my tank and have replaced the entire exhaust system from headers to muffler.
The code P0138 is on for two possible different situations. Either the oxygen sensor has shorted out on the exhaust system or the wiring from the battery to the sensor has a short or break in it. Check the oxygen...

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