Q: Speedometer is jumping and my car is jerking

asked by on

My Speedometer is jumping and my car is jerking as I accelerate! what Typically causes this Problem?

My car has 193919 miles.
My car has an automatic transmission.

This could be related to a couple of possibilities. The [instrument voltage regulator]((https://www.yourmechanic.com/services/instrument-voltage-regulator-replacement) regulates the voltage supplied to the various gauges in your vehicle’s dash. When this is not working properly, this may cause the gauges in your dash to dim or flicker erratically or in some cases provide false readings. This may also be caused by a faulty instrument gauge cluster.

This may also be caused by a faulty transmission speed sensor. The speed sensor reads the rotational speed of the reluctor wheel, located within the transmission. The speed sensor also controls the anti-lock braking system. Driving with a bad speed sensor usually causes the ABS to malfunction and can lead to loss of braking power and/or an accident. When this is not working properly, you may also notice the transmission hesitating to shift gears, erratic tachometer readings, the speedometer not working properly or the odometer not working properly. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

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 is jumping and my car is jerking

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: My key fob doesn't unlock my 2007 Pontiac Grand prix and my obd 2 reader won't connect.

As far as the malfunctioning key fob, it may be time for a new unit. The contacts may be worn out on the circuit board inside the device or the button may be worn and not making enough contact. You...

Q: Key turns, no crank

The starting system is rather simple. There are only a few components that can cause this to happen. The first place to check is with the starter. They can fail intermittently and this is a sign that it is going...

Q: Car dies if I let off gas pedal

This is a common problem that I run across frequently on this engine. The most common cause of this is a bad intake manifold gasket. When this occurs it create a large vacuum leak that makes it hard for the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...