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

 

Question

hpm, Dunlap, IL, January 08, 2011, 17:31
 Rookie

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, 18:52
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     Master

    P0115 is a bad coolant temperature sensor or stuck open thermostat, P0173 is a fuel trim malfunction issue. Check this website
    http://www.benzworld.org

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    hpm, January 09, 2011, 12:29
     Rookie

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

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