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2001 Mercedes-Benz C320 Question: check engine light stays on



hpm, Dunlap, IL, January 08, 2011, 20:31

I'm getting code P0173 and P0115. Are they related?
Will P0115 go away if the car warms up????
Resetting the computer so the MIL light goes out keeps failing.

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, January 08, 2011, 21:52

    P0115 is a bad coolant temperature sensor or stuck open thermostat, P0173 is a fuel trim malfunction issue. Check this website

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  • Reply

    hpm, January 09, 2011, 15:29

    could both codes have something to do with pre cat O2 sensor and O2 sensor heater?
    Is there a connection?

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