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I need help whit a 1995 Mercedes Benz S420 4.2L whit code p1137, I replace the O2 sensor, and still giving that code there is an electric wiring diagram.

Vehicle: 1995 Mercedes Benz S420 4.2L

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P1137 Lack of 02 sensor switch.

Do a throttle body cleaning first, see if that helps.

Mercedes Benz S420 4.2L Oxygen Sensor Diagram

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