Skip the auto shop - Our mechanics make house calls

Q: IAC valve

asked by on

I bought a car that has a bad idle air control valve. I want to know if it is save to drive it home, I will only be driving 5mins to get home. So in those 5 mins will the car be save enough to make it home.

My car has 164000 miles.
My car has an automatic transmission.

A: Hello. Your car should be safe enough to dr...

Hello. Your car should be safe enough to drive home. The one risk of this may be that it could potentially leave you stranded momentarily, but most of the time even when this valve is not working properly, it will still allow the car to run, albeit not run very well. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. 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 done by the idle air control valve. When the engine RPM drops below the normal range of 750-800 RPM (for most cars), this may indicate a dirty or faulty idle air control valve. If you need further help with an idle air control valve replacement, a certified technician from YourMechanic can assist with this repair.

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・Save up to 30%

Get a quote

What others are asking

Q: My car lacks power, the acceleration doesn't seem to be there and there has been a few times where my car had trouble starting.

Hi there. I understand your concern and have experienced this feeling myself once my vehicle had some mileage. How often is the maintenance performed? When was the last time the air filter, spark plugs, oil, trans, etc. changed? Has the...

Q: Poor fuel mileage

Hi There, There are a number of things that can cause poor fuel mileage. A faulty camshaft position sensor is one of them. The camshaft position sensor is a magnetic sensor that monitors camshaft speed to regulate ignition timing and...

Q: Car idles but will not drive (dies when revving engine)

Without additional details as to more specific symptoms, this may require further inspection and diagnosing. However, issues while revving may be a sign of a failing throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.