Skip the auto shop - Our mechanics make house calls

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.

A: With the speed limitation and the loud nois...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: At green light, accelerated, engine revved, but car barely moved

Hello. It sounds like that there was a glitch inside the TCM, known as the transmission control module. There is a TCM update available for your vehicle. Call your dealership to see if the update has been done already or...

Q: Bank 1 and Bank 2 running lean

If lean faults occur after the manifold was removed and reinstalled, this indicates a vacuum leak which also means that unmetered air is coming into the intake. Either a vacuum line or induction pipe is loose, or the manifold is...

Q: My water pump went out, I drove the car about 10 more miles before stopping, did I create additional engine damage?

Hi there! Yes, that is definitely enough time to do catastrophic damage and seize the engine. With your water pump going out and no coolant circulating through the engine, there is tremendous heat being generated and stored, and with heat...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...