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I have a code P0138 o2s ckt high volts 12, what does this mean?
Vehicle: 2005 camry LE, 4 liter

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P0138 Oxygen sensor circuit high voltage Bank 1 Sensor 2

Sensor 2 is for the catalytic convertor monitor sensor, or the downstream 02 sensor, when there is a circuit high code this mean there is a failed connection either at the sensor or internal of the sensor

 Here a 02 sensor that set a P0138, P0138 mean there is a failed connection looking at the connection there was electrical tape on the connection, where there should not have been

 Unravel the tape and there was the cause, unfortunately the owner failed to make a proper connection which lead to P0138,

 

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