Mechanics

WHAT WOULD MAKE A SPEEDOMETER READ INCORRECTLY?

2001 Pontiac Grand Am • 198,500 miles

I have a pontiac grand am that the speedometer is reading faster than I am going. It's about 2 mph off, under 50, and 5 mph over 50. All other gauges seem to work just fine, and tires are the correct size.
Avatar
Nkbraswell
November 9, 2011.




Have you had any transmission work done lately?

There is a speed sensor for the speedometer that may be reading wrong or has the wrong ring for the speedometer.

Roy

HAVE YOU PUT OVER SIZED TIRES ON IT? IF SO THAT WOULD CHANGE IT
AD

Tiny
BILLYBOB
Nov 10, 2011.
No tranny work or over sized tires. I didn't know how long it has been wrong. I got pulled over the other day. The officer said I was going 66, but I had the cruise set at 60. So I downloaded a GPS speed tracking app. It seems to confirms the problem.

Tiny
Nkbraswell
Nov 10, 2011.

AD