Question about 2005 Chevrolet Impala

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2005 Chevy Impala speedometer

My speedometer acts up randomly, but usually when I've been driving for an hour out of town is when it happens.
All of a sudden, it goes haywire, and I'm going 120, 90, 100, but always about 20-40 mph higher than I'm actually going.

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  • 1popeye Jan 16, 2009

    I have a problem with my speedometer indicated my car traveling about 20-60 mph faster than I am really going. When I stop the car and turn off the engine the speedometer stays on about 60 and does not go down to zero. Do you have a fix for this?

  • aqfire May 07, 2009

    I'm driving around and suddenly notice the speedometer is reading higher than I think I'm driving. Sure enough, it climbs randomly, generally matching your slowing down and speeding up but way off on speed. The only way to get it to go back that I have found is by turning the car off and on (without starting it) a bunch of times until it finally settles to 0.

  • Anonymous May 17, 2009

    my vehicle does not mark the speed i am traveling.

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Replace the speed sensor, but also make sure you clear any codes, even if none are showing up, disconnect the battery for about 1 hour. After that drive it easy for a while, so it can relearn.

Posted on Dec 30, 2009

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Should have mentioned, check engine light is not on, and there are no codes stored in the PCM.

do you think i should be looking at replacing the speedometer guage itself, or start with the vehicle speed sensor? also, are the sensors on the front wheels for the ABS, and the vehicle speed sensor is on the back of the transmission? does this sound correct?

Posted on Jan 06, 2009

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