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Generally, an idle air control valve or IAC valve replacement could cost anywhere from $120 to $500. This cost may vary as per the make and model of your vehicle, part price, and labor charges in your area.
The car part cost alone could set you back by $70 to $400, while a mechanic may charge $50 to $100 as labor charges. That said, the labor charges are usually low as the valve replacement doesn’t take long.
While you can continue to drive with a faulty idle air control valve, you ideally shouldn’t.
A bad IAC valve could cause your engine to stall, which can easily compromise your road safety. Also, if your vehicle’s Check Engine Light comes on due to a bad air control valve, you may not pass a state emissions test.
Bottomline — it’s best to get a faulty IAC valve replaced as soon as you spot one.
Several signs could indicate a bad idle control valve. But, these symptoms may also show up due to other engine troubles. In that case, it’s best to have a mechanic inspect your IAC valve to ascertain if that’s what is causing these symptoms.
Here are some signs that could give you a heads up about a faulty idle control valve:
Here are answers to some common IAC valve-related queries:
An idle air control valve, also known as an idle air control actuator, is usually used in fuel-injected vehicles. Its role is to control the airflow needed in the combustion engine to maintain a steady idle speed. Essentially, the valve acts as a bypass of the throttle body plate.
Your vehicle’s Engine Control Module digitally monitors the idle control valve to maintain the required idling RPM irrespective of the driving conditions or engine load.
This lets you move your car from an idle position by simply releasing the clutch or brake.
The idle control valve is usually located on the intake manifold near the back of the throttle body. The intake manifold is the engine part that supplies the air-fuel mixture to the cylinders.
Most modern cars today have the valve integrated into the throttle body.
While an IAC valve has a reasonably long life, it could malfunction prematurely. Some of the common reasons for its failure are:
While replacing an idle air control valve is relatively easy, you still need to know your car parts well. If you’re not sure, it’s best to have a certified technician do the replacement for you.
Here’s how a mechanic will replace an idle control valve:
Not sure? Let us diagnose
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