Speedometer quit working

Tiny
SKIP1180
  • MEMBER
  • PONTIAC GRAND PRIX
I have 1994 pontiac grand prix 90,000 mi, 3.1 engine -speedometer just quit working and I wondered what I should be looking for and where to start thank you
Sunday, November 25th, 2007 AT 6:50 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It sounds like you have a faulty vehicle speed sensor (VSS).
It sends a signal of the transmission shaft rotation to the ECM and that gets translated into the gauges display that you see on the dash.

The VSS is located on the transaxle housing, just above the right front drive axle.
It is mounted with a single bolt, and it has a 2-wire connector. Simply unplug the harness and remove the bolt to take out the sensor.

You also want to make sure that the VSS is secured and does not have any corrosion on the harness.

Please let me know if you have any questions.
Thank you.
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Friday, January 14th, 2022 AT 8:46 PM

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