Q: Vehicle won't go over 20 MPH

asked by on

I hear a loud noise coming from the engine and the car won't go over 20 MPH.

With the speed limitation and the loud noise, I recommend not driving the vehicle until it has been diagnosed and repaired. It sounds like the vehicle is either in limp mode or a mechanical failure has stopped the vehicle from moving properly. A qualified technician, like one from YourMechanic, will be able to diagnose your acceleration issue and perform any repairs that are required.

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. Vehicle won't go over 20 MPH

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: Occasional shaking and sluggishness while accelerating

If your vehicle is shaking and losing power, the most likely cause is fuel or ignition system related. I would recommend having the fuel pressure checked by a qualified professional to determine whether or not the fuel pressure is within...

Q: Ok. My car alternator and battery tested good yet it has to be jumped off and after driving 1/4 of a mile it cuts off and dies

You need to have the battery and charging system checked again. You have a bad connection to battery or battery is bad and not charging. I recommend cleaning battery terminals by removing and cleaning then and reinstall then test entire...

Q: Ticking in Engine

There are a number of issues at play here. The transmission definitely needs to be looked at if it is slipping in any gear or when locking up as you describe. The knocking sound may also be a possibility of...

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 Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.