Q: Why does my car lose power at 20 miles an hour and 60 miles an hour and my check engine light goes on and off

asked by on

Sometimes when I'm driving I get to 20 miles an hour and the car starts to lose power then it picks back up after I cut the car off and cut it back on then when I'm getting up to 60 miles an hour does the same and when I cut the car off and cut it back on I get all the power again what's my problem

My car has 154000 miles.
My car has an automatic transmission.

Hello. It sounds like you may have a sensor issue going on with your car. Most of the time when something like this occurs it is caused by a throttle position sensor that is not working properly. It can also be caused by worn out fuel system or ignition system parts but it is most commonly a sensor. I will usually install my scan tool and drive the vehicle while monitoring what the sensors are doing. This would tell me if there is a sensor issue going on. If the sensors are reading correctly then I inspect the ignition system and also test the fuel pressure. If you are looking to have this loss of power checked, consider having a YourMechanic certified technician come to your home or office to diagnose why it is losing power.

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. Why does my car lose power at 20 miles an hour and 60 miles an hour and my check engine light goes on and off

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: Code p0101

The P0101 trouble code may keep returning if the engine computer does not see the MAF sensor input within a specified range when it is testing the MAF input. The input can be wrong if the engine has another problem...

Q: Car randomly hesitates

Hello. There are a few things that may explain why you are experiencing a hesitation problem with your 2002 Lexus SC430. However, it is very difficult for any mechanic to diagnose an intermittent condition. Sometimes they need to worsen before...

Q: Vsc , check engine light

Hi There, The VSC (Vehicle Stability Control) light indicates that there may be something wrong with the traction control system. The traction control system monitors the steering and stability of the vehicle and engages when loss of traction has been...

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...
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...