My 2007 Kia Rio has a buzzing sound coming from the Idle Speed Control Actuator when the key is on and when you run the car that actuator gets very hot. Any help would be great

Sounds like a bad door lock actuator if electronic.

replace the idle control module

The common idle speed is 600 to 1000 rpm... however most vehicles run around 750 or so

Extracted from Engine-Codes.com

Code P0507

Possible causes

- Dirty throttle body

- Electric throttle control actuator misadjusted or damaged

- Faulty Electric throttle control actuator

- Intake air leak

- Poor electrical connection to the Intake Air Control (IAC) valve


What does this mean?

Tech notes

If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. If the code comes back you may have to replaced the Electric Throttle Control Actuator (Motor) to repair the problem.



There is a factory service bulletin for the following Chevrolet models:



2006-2008 Chevrolet Trail Blazer

2007-2008 Chevrolet Avalanche

2007-2008 Chevrolet Express

2007-2008 Chevrolet Silverado

2007-2008 Chevrolet Suburban

2007-2008 Chevrolet Tahoe

Chevrolet Factory Service Bulletin OBDII Code P0507


What does this mean?

When is the code detected?

Thi P0507 code sets when the Powertrain Control Module (PCM) detects an engine speed outside of the Idle Air Control (IAC) valve range of control.

Possible symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

- Engine hard to start

- Rough or erratic idle speed

P0507 Chevrolet Description

The Idle Air Control (IAC) valve is a Powertrain Control Module (PCM) controlled stepper motor located on the throttle body. The stepper motor drives a valve pintle which protrudes into a passage that bypasses the throttle plates. The PCM commands the IAC valve pintle to extend to decrease the idle speed. The bypass air flow is reduced and the idle speed decreases as the pintle approaches its seat. The PCM retracts the IAC valve pintle away from its seat to increase the idle speed. The retracting of the IAC valve pintle allows more air to bypass the throttle plates. One of the PCMs uses for the IAC system is to maintain a desired idle speed. This DTC sets when the PCM detects an engine speed outside of the IAC\'s range of control.





Read more: http://engine-codes.com/p0507_chevrolet.html#ixzz3ObdI2chF

Yes, will idle better, and control fuel better...be sure to use the
Mass Air Flow Sensor spray to clean...this does not harm any of the
factory coatings...Hope this helps.

Possible causes for P1505 & p1507
Faulty Idle Speed Control Actuator valve, harness is open or shorted, Idle Speed Control Actuator valve circuit poor electrical connection. No the codes are not related to the EGR. P0198 is related to the engine oil temperature sensor. By the way you should use a meter as supposed to a test light. The test light will not be able to measure 5 volts reference or voltage drops. However I would try replacing the affected parts based on the codes and the info you've provided. Good luck.

When is the code detected? The idle speed is less than the target idle speed by 100 rpm or more.
Possible Causes - Dirty throttle body
- Electric throttle control actuator misadjusted or damaged
- Faulty Electric throttle control actuator
- Intake air leak
- Poor electrical connection to the Intake Air Control (IAC) valve
Possible Solution If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. If the code comes back you may have to replaced the Electric Throttle Control Actuator (Motor) to repair the problem.

Idle Speed Control (ISC) Motor OPERATION Eagle Throttle Body Fuel Injection (TBI) System NOTE: The Eagle TBI system is used only on 2.5L Premier engines. The Idle Speed Control (ISC) motor is mounted to the throttle body and controlled by the PCM. The throttle lever rests against the initial adjustment screw of the actuator (plunger). The idle speed is not adjustable. The initial adjustment screw is only used to establish the initial positioning of the actuator when the ISC motor has been replaced. The actuator extends or retracts to control engine idle speed and to set throttle stop angle during deceleration. Based on inputs from the various engine control system sensors and switches to the PCM supplies current to the ISC motor to adjust the actuator position for the particular operating conditions.
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P2103-tac means High Idle Speed

Hi there!It sounds like you may have a problem with the idle speed control actualtor.This unit adjusts air to air fuel mixture.Sometimes it can get covered with carbon and not work correctly.Try taking it off and cleaning it good with some carb cleaner.Then reinstall it and see if the performance is any better.If it is then you should replace it.Here is some info,hope it helps!Thanks It is the intake air control valve in the diagram below.
The idle speed control actuator maintains idle speed according to various engine loads and conditions. This component also provides additional air during startup. It consists of an opening coil, a closing coil and a permanent magnet. According to the control signals from the ECM, the valve rotor rotates to control the bypass air flow into the engine.