2008 Pontiac Grand Prix Speedometer

Tiny
VANDYKE
  • MEMBER
  • 2008 PONTIAC GRAND PRIX
2008 Pontiac Grand Prix 6 cyl Automatic 50000 miles

I was driving down the road today and looked at my speedometer and it said that I was going 115mph and I was going about 55mph (Close Estimate). I pulled over and it went down to 0mph. I turned my car off and started it again, but when I took off it did the same thing, it was still saying I was going between 100mph and 120mph when I was actually going 50mph to 60mph. What could this be and is it serious?
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Saturday, August 21st, 2010 AT 8:42 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
Have the vehicle speed sensor (VSS) checked.
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Tuesday, September 7th, 2010 AT 7:25 AM

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