Question about 1993 Chevrolet Lumina

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1993 lumina i did a diagnostic test with the paper clip. the cooling fan turned on as soon as i put the clip in....normal? the fan wouldn't come on when the engine was hot and when i did the test it was cold! anyway... i got a code 33 & 35. any ideas?

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  • Rick Byrd
    Rick Byrd May 11, 2010

    code 33 is for a MAP sensor issue , too high voltage in a given time

    code 35 is for a IAC circuit issue , this will set when idle speeds are at least 150 rpm's away from target speed for 20 seconds or more ,

    fan coming on when in diagnostic loop , sure .

    what was the specific issue with the vehicle ?




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  • 33 Answers

If the fan is not working it is most likley a bad tempature sensor that controlls the fan going on and off at certen temps.

Posted on Jan 10, 2009

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