Q: Speedometer 5 MPH too slow

asked by on

The van is going five miles under the speed it is showing on the speedometer.

Speedometer issues are not very common and sometimes can be caused by things we do. For example replacing the tires. Tires need to be replaced with tires of the exact same size because that is the size that is programmed into the vehicles computer. So the speedometer calculation is done based on that. If you have replaced your tires with a different size, the vehicle can be reprogrammed to the new tire size so that it all works correctly. This is something that the dealership will need to do for you as it is a factory setting. If you have not replaced your tires, but are still having issues, it might be caused by the speed sensor in the transmission. Some vehicles have two speed sensors. A qualified mechanic can determine the speedometer issue and replace the necessary parts to get it functioning properly again.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Speedometer 5 MPH too slow

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Rear passenger tire has slight inward tilt

Any time there is abnormal wear on the tire, you know something is wrong. The fact that you can see the inward tilt of the wheel is not good. It could be a wheel bearing, but this would accompany a...

Q: The price of unplugging the EGR passage

It depends on the car and what you need to do. I’ve got a video “unplug the EGR low-flow with a speedometer cable” and a lot of times they work pretty well. You unbolt the EGR valve and then you...

Q: Loud Noise when braking at high speed

Hi there. If the humming noise is a high pitched hum, or more of a consistent squeaking sound, it's possible that it is caused by a build-up of brake dust on the brake rotors. In most cases, this is not...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...