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98 M3-engine light on during cold weather

 
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rntexas



Joined: 13 Dec 2005
Posts: 1

PostPosted: Tue Dec 13, 2005 10:35 pm    Post subject: 98 M3-engine light on during cold weather Reply with quote

Anybody know what the problem might be? Engine light turns on only when the weather is really cold and the heater takes forever to heat up the car. Also, temp. gauge never gets out of the blue. Thanks for your input. Laughing
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jlevie



Joined: 01 Jan 2005
Posts: 553
Location: Huntsvile, AL

PostPosted: Sat Dec 17, 2005 9:49 pm    Post subject: Reply with quote

All of those symptoms point to a thermostat that's stuck in the open position. Replace it with a new one. You can, and should, have the fault codes read out of the OBD. I'm sure there'll be a fault code relating to the cold running engine, but there could be others as well. Fix the thermostat problem, reset the faults, and see how it behaves.
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