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Speedometer not working

Tiny
PATRICKC78
  • MEMBER
  • 2006 PONTIAC G6
  • 3.9L
  • V6
  • 2WD
  • AUTOMATIC
  • 1,200,000 MILES
Car starts runs, shifts and everything's fine. However, the speedometer saying error and the needle doesn't work, it moves when I first start car but after that nothing.
Sunday, March 20th, 2022 AT 8:49 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It sounds like an issue with the vehicle speed sensor (VSS).
The speed sensor is what sends the transmission shaft rotation info to the ECM and that gets converter to the speedometer display.
A faulty VSS will prevent the speedometer from working. It can also be due to a faulty connector to the sensor.

I have attached diagrams below for your reference.

Please let me know if you have any questions.
Thank you.
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Sunday, March 20th, 2022 AT 8:56 AM

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