Q: Q: My car shuts off when it stops

asked by on

My car shut off two weeks ago. I ended up having a corroded battery and got it replaced. Shortly after, a "check engine" light came on. I've had it on for about a week but haven't had time to get it checked out. Today as I was driving, my car turned off each time I stopped at a red light. While driving, it was perfectly fine. What's up?

My car has 134000 miles.
My car has an automatic transmission.

Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate and eventually stall. The idle air control valve is a small valve on the engine’s intake system that reads the air intake as it comes into the motor. This is controlled by the car’s ECM which uses this information to make adjustments to the air/fuel ratio depending on various inputs such as outside air temperature, intake air temperature, load and various other things. As you accelerate, your car’s engine is receiving a much higher dose of fuel than when at idle and conversely, when you let off the gas pedal, there is a sudden change in this fuel supply as a result of your foot letting off the pedal. When this happens, the job of the idle air control valve is to bring this deceleration down to a slow and smooth idle rather than suddenly cutting off the fuel supply causing the motor to die. When the idle air control valve is not working properly, this cause a disruption in this process resulting in the engine not being able to idle properly. I would recommend having a professional 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. Q: My car shuts off when it stops

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: I had a wheel bearing replaced, now it seems to be worse 5 days later

I can see two possibilities. Either the bearing was damaged during the replacement, or the diagnosis was wrong and the wheel bearing was not the original problem. If the wheel bearing was damaged during replacement, then he is obligated to...

Q: Push the gas pedal and the car moves slowly until it finally catches up. The engine sounds funny. How much to get it looked at?

What your car is experiencing is referred to as "loss of power". Among common possibilities for loss of power are throttle body faults (electronic throttle controls, mass airflow sensor, torn air intake hose), worn out spark plugs, faulty fuel pump...

Q: How do I get the maintenance required light to stop blinking and my temperature gauge to be normal?

Hi there, thanks for writing in. The Toyota maintenance light is a reminder to get your oil changed. This light comes on periodically and needs to be reset with every oil change. As for the temperature gauge this is normal....

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 Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...