Skip the auto shop - Our mechanics make house calls

Q: Acceleration problems, car shaking and check engine light on

asked by on

My car with the automatic transmission occasionally hesitates to shift when I try to give it gas and accelerate. It sounds as if it is running at high speeds even though it is only 10 mph. Inspite of my mph decelerates, the RPM is changing, increasing and decreasing. Sometimes the car runs fine. I tried to give it gas, then step on the brake to test how it works. Then it happens that the car shakes and the check engine light comes on. These problems usually occur when I press the gas hard and take off fast or when I try to accelerate from 50 mph to higher speeds.Speedometer also doesn't work correctly. It sometimes shows no speed while I am driving. What could be the problem?

A: Hi there. There are a few different things ...

Hi there. There are a few different things that can cause this. It can be the fact that the speedometer is not working due to a bad transmission speed sensor. This can cause the computer to not know when to shift the transmission. I typically start by testing and replacing this sensor.

If the issue persists, then the transmission needs to be checked. It sounds like you may have an internal transmission failure that is starting. The internal pressure need to be checked to see if there is an internal clutch failure. If you need to have the vehicle looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair your car's hesitation issue.

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

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: Air conditioning compressor

There may be an internal problem with the AC compressor. Look at the belt that drives the compressor and if it looks abnormally worn, the compressor may be putting extra resistance on the belts which can be a sign of...

Q: Engine hesitating and revving

It sounds like the transmission may be slipping. With the engine running, fully warmed up, and in Park, pull the transmission dipstick and wipe it with a clean rag. Insert the dipstick fully into the tube and pull it back out...

Q: Car struggles to start. Won't turn over.

You should have a technician look at the car to determine if it is an electrical or a fuel problem. You will need to remove the spark plug and get a spark plug tool to test for spark when you...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.