2002 Mercedes Benz C180 Repair Question
Mercedes fault code 0138
My Mercedes C180 2002 has the engine light on.
I have got a code of 0138 and it says O2 sensor high voltage.
Does it need to be replace or could I clean it? Mileage is about 80,000 and which sensor should I change (is there only one) my code reader says bank 1
Thanks for any help
i would not be so quick to do anything. you need a shop with a scanner to monitor the sensor to verify the voltages and if they are off, to determine why. it is the upstream sensor but it could be a variety of things causing it.
cleaning an o2 does nothing. they are not serviceable.
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