Skip the auto shop - Our mechanics make house calls

Q: Cutting off when coming to a stop

asked by on

Went to a mechanic and said it was the throttle body but first we put gas in the car and it started cutting off when coming to a stop before it ran fine we got a 2000 throttle body and the mechanic put it in and said it would still cut off bcz it needs a couple of days to reprogram does that sound right?

My car has an automatic transmission.

Unfortunately, without the make and model of your vehicle, this would be tough to diagnose. Generally, when the engine dies when coming to a stop, this is commonly related to what is known as an idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle’s computer which will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed. This is all controlled by the idle air control valve. When the engine RPM drops below the normal range of 750-800 RPM (for most cars), this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. I would recommend having an expert from YourMechanic come to your location to diagnose and repair your idle air control valve.

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
  1. Home
  2. Questions
  3. Cutting off when coming to a stop

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: Car dies under acceleration

Hello there, many common faults will cause your 2001 Toyota Corolla to have a loss of power. Replacing the spark plugs is a great place to start as this is one of the causes. Other potential faults are the the...

Q: Low Idle and stalling when breaking

Hello there, many common faults will cause your 1997 Jeep Grand Cherokee to die when the vehicle comes to a stop and have a low idle. You have done great in replacing the idle air valve as this is a...

Q: Car shuts off when driving at a very low speed

This may be related to a dirty or failing idle air control valve. This is a unit in the intake system that monitors the air intake as it is mixed with fuel at idle or low speeds prior to the...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
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.