Skip the auto shop - Our mechanics make house calls

Q: Why does the car stop suddenly?

asked by on

We will be driving the stratus, and slow down to stop at a red light. Once slowed down and stopped, the car shuts off. It doesn't have issues starting back up again, but it's inconvenient to stop at a sudden time. Could it be the alternator, the battery is going out, the batteries terminals need cleaned or the plain terminals need replaced?

My car has 291000 miles.
My car has an automatic transmission.

A: This may be related to a dirty or failing i...

This may be related to a dirty or failing 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

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・Fair and transparent pricing

Get a quote

What others are asking

Q: What could be wrong with my car if the wheel is hard to turn while driving? I put power steering fluid in the car.

There can be many different possible causes of hard power steering. The most common things to check for are a broken power steering pump belt, or a leak that has caused the pump to run out of fluid. A power...

Q: Idling problem.

Hi There, This may be caused by a vacuum leak or potentially a dirty or faulty idle air control valve. A vacuum leak may allow too much air into the motor in relation to the fuel mixture causing the motor...

Q: I need to replace my catalytic converter and I wanted to see what are the main parts I will need to buy that comes with it?

The parts required to change out a catalytic convertor will really depend on what type of converter is going to be used. There are factory type replacements that will use a flange and just get bolted into place, that will...

Related articles

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...
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...
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...