Q: Can the idle air control cause my engine to idle roughly?

asked by on

My 2006 2.4L Kia Optima has a rough idle. This started 2 days ago. I changed plugs and wires, still rough idle. Someone said it could be the idle control.

My car has 136000 miles.
My car has an automatic transmission.

Hi, thanks for writing in. Sure, the idle control valve can definitely cause the rough idle. Typically this will be caused by excess carbon buildup inside the throttle body or fuel injector nozzles themselves. Your 2006 Kia has multiple sensors that monitor and control the fuel system. If one of these sensors is dirty, damaged or sending misinformation to the Engine Control Module, it can cause the idle to run very rough. Some other issues that may be causing this symptom may include dirty EGR valve, air/fuel sensor or problems with the throttle body itself.

If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Can the idle air control cause my engine to idle roughly?

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: Battery was replaced. In the morning when crunk to let warm up, after 2 min. It shuts off. When going to restart it takes a minute

This may be likely related to what is called an idle air control valve/module. This unit regulates the air flow into the motor at idle or low speeds as it is mixed with fuel prior to being injected into the...

Q: Bounces up and down over little bumps

Excessive bouncing is caused by worn out or leaking shocks and struts. Go to each corner of the vehicle and push down and let go of the car. It will bounce more than once then that shock or strut is...

Q: 2006 Hyundai Sonata p2106 code how do I repair

This trouble code indicates an issue with the intake manifold runner circuit. This could be an issue with the wiring, the intake runner position sensor, or the powertrain control module. I would recommend having your vehicle inspected by a qualified...

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...
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...
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.