Skip the auto shop - Our mechanics make house calls

Q: Car stalls at traffic lights

asked by on

I have been having this issue since August, my car starts normally and drives fine but whenever I get at a stop light and I'm sitting at the light for more than a couple of minutes my car would slowly accelerate at best and at worst my car will completely stop and not move at all, everything would still be on and running but my car would be still. It's becoming a hassle to commute in my car and get anything done.

My car has 200k+ miles on it

My check engine light was on and it was my 02 sensors which I replaced and the light is off but that didn't help.

Transmission Fluid is fine.

I replaced the air filter and the car drove better but after being on the road for about 10-15 minutes it started stalling out at lights.

What could be any other possible issues I can fix?

My car has 200000 miles.
My car has an automatic transmission.

If this is happening primarily at stop lights, it may be related to a dirty or faulty idle air control valve. This is a unit in your car’s intake system that monitors the flow of air into the engine and adjusts the air/fuel mixture accordingly. When this is not working properly, it may cause the engine control unit (ECU) to make inaccurate adjustments to the air/fuel ratio, which could cause the stalling you described. When this happens, it is usually a result of the engine being over fueled or under fueled depending on what the idle air control valve is reading. I would recommend having an expert technician, such as one from YourMechanic, take a look at your car to properly diagnose your stalling 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

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: The car continously switches off in the morning, basically it has a cold start but once on the road it is fine

Hello. Issues during cold start can be caused by many things. A few common causes are issues with the engine management or fuel system. Virtually all engines are designed to run with an increased amount of fuel during cold starts,...

Q: Power Steering Parts? 1999 Chevrolet Camaro

Hello - most pumps come with a cap and internal filter & seals, but NOT the pulley. You will need to remove the pulley from your old pump, and re-install it on the new pump. The other bits are new...

Q: Advice on fitting new brake pads

Yes, open the bleeder screw. ABS systems are really complicated and expensive. On the old cars, you just squeeze them without worrying about it. But, when you are doing that one caliper, just open the brake bleeder over the pan...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...