SPONSORED LINKS

Speedometer fluctuating?

Tiny
JAZZYWANTSTOKNOW
  • MEMBER
  • 2011 HYUNDAI SANTA FE
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
When I turn my car on, or while idling, my speedometer will jump all over the place. Sometimes it only goes back and forth between 0-20, other times it goes all the way to 140 at the speedometer max. While driving, it behaves normally, despite being off by 5 MPH
Since it started, both my battery and Alternator have been replaced.
SPONSORED LINKS
Thursday, January 19th, 2023 AT 1:40 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
Hi,

Based on your description, I suspect there is a voltage spike to the speedometer head in the vehicle that may be coming from the printed circuit board in the cluster. However, there is only one way to test. I have directions for testing the speedo and the vehicle speed sensor. I have attached both below.

The test for the speedometer is something you will not likely be able to perform at home. Take a look at it. On the other hand, we can test the VSS to see if there are any odd signals or voltage changes when the vehicle isn't moving.

Take a look through the directions and let me know if you feel comfortable performing them.

Let me know.

Joe

See pics below.
Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, January 19th, 2023 AT 6:03 PM

Please login or register to post a reply.

Related Instrument Cluster Gauge Speedometer Content

VIEW MORE

Sponsored links