cooling fan runs abnormally on 1999 Mercury Grand Marquis

Hello, While driving Last week my service engine light came on. I then noticed that the cooling fan would come on, even when starting the car or driving only a short distance. Are the 2 related or do I have seperate problems? Thanks

by in Brookton, ME on October 12, 2009
1 answer
ANSWER by on October 12, 2009
Well, if the vehicle computer sees a problem with the signal it is getting from the engine temperature sensor, it could fail safe by turning on the fans and keeping them on. Or it could be that any number of DTC codes has caused the engine to enter "limp-home" mode, and would turn the fans on by default. Go to your local parts house, most will scan codes for free, reply back with the DTCs you get, and we can discuss this issue further.

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