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・Fair and transparent pricing

Get a quote

What others are asking

Q: car lost acceleration and could only go under 5mpr

The vehicle is in limp mode. This is due to the engine computer detectecting a fault that could potentially damage the engine If the vehicle is driven. This is the computers attempt to save the engine from further harm. There...

Q: Alternator or Battery is not Charging

The first thing is that disconnecting the battery cable when the engine is running can damage the alternator and computer modules on the vehicle. This will cause voltage spikes that will burn electrical circuits out. With the description of the...

Q: Car won't idle

The idle is computer controlled on your car and over time, your engine computer adapts to changes in your engine over time. When your battery is disconnected or goes dead, the computer will reset and go back to factory settings....

Related articles

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...
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...
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...