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2001 Buick Park Avenue Question: Speedometer is reading 20 to 30 mph too fast.

 

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mstriegl, 3.8L V6, Kingfisher, OK, January 16, 2012, 16:12
 Rookie

I am ASE mechanic as side job.

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  • Answer #1

    January 16, 2012, 18:44
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     Master

    make sure you have the correct tire size on the car.

    otherwise, the trans gear inside the governor may be at fault.

    Roy

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    mstriegl, January 17, 2012, 09:00
     Rookie

    The tires have not been replaced, it just started doing this about 1 week ago. I suspect the speed sensor is failing.

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