Skip the auto shop - Our mechanics make house calls

Q: Why is my car idling high at an RPM of 1200?

asked by on

After cleaning throttle

My car has 139000 miles.
My car has an automatic transmission.

A: This may be caused by a dirty or failing id...

This may be caused by a dirty or failing idle air control valve/module. As you may know, this is a unit that monitors the air intake as it is mixed with fuel prior to being injected into the engine. When this is not working properly, this can cause the air/fuel ratio to be out of balance causing a spike in idling as you have experienced. I would recommend having an expert, such as one from YourMechanic, come to your location to diagnose and repair your high idle 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・Save up to 30%

Get a quote

What others are asking

Q: My brake light stays on - 2004 Infiniti QX56

Hi there. Check the brake pedal brake light switch to see if the contacts are closed (meaning the switch is engaged) with the pedal all the way up. It is possible that the brake pedal has moved down a little...

Q: Car randomly stalls at idle and at high speeds when clutch is pressed

Hello. This is a common issue when the idle air control valve not working properly. This is a unit that regulates air intake as it is mixed with fuel at idle or low speeds prior to being injected into the...

Q: I do not know if my battery or cables are bad.

Hello, thanks for writing in. It is possible that the cables are bad internally. Over time they will form corrosion inside of them that will cause this. Most of the time the problem is the battery though. I typically have...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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 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.