Speedometer works intermittently

2005 BUICK RENDEZVOUS
170,000 MILES • 3.4L • V6 • 2WD • AUTOMATIC
Avatar
AARON BLACQUIERE
  • MEMBER
  • 4 POSTS
Speedometer works for a while, then stops, then works.
May 6, 2018 at 1:15 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good morning.

There is a sensor on the transmission that controls the speedometer. It is a common failure.

Is the check engine light on? If it is, do you know the code?

Roy
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
May 7, 2018 at 4:15 AM
Avatar
AARON BLACQUIERE
  • MEMBER
  • 4 POSTS
Check engine light is not on.
May 7, 2018 at 2:52 PM
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Okay.

Then you will need an advanced scan tool to see if the signal from the sensor is reaching the PCM. If the signal is getting there then it is the instrument cluster is the issue.

If there is no signal then it may be the sensor not sending the signal.

Roy
May 7, 2018 at 3:05 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.