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.

A: If this is happening primarily at stop ligh...

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

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: Alternator bracket broken.

A broken alternator bracket may cause some belt slip which will amount to charging system problems so the technician is correct on this part. The price to replace the parts will vary among service facilities as many facilities will have...

Q: Heater blows cold

In very cold weather a vehicle may need more time to heat up before hand to help start the car efficiently. In some cases old or low coolant levels can affect the ability your vehicle has to produce sufficient heat....

Q: What causes the engine to run rough and the engine to die when the accelerator is pressed?

Hello. You have covered most of the common parts that fail with the exception of the idle air control valve/module. This is a unit that works similarly to the mass air flow sensor as it regulates the air intake into...

Related articles

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...
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...
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.