Question about 2006 Chevrolet Cobalt

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06 - 2.4 cobalt. cleaned throttle body tring to remidy a low idle. now the rpm,s are 1700. the check engine lite has been on for months,. and still on.This sounds like a dealer tow, now

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Should never clean the throtal body on these cars unless absolutely nessasry. and if you do have to clean them dont move the plate and just use a rag sprayed with carb/throtal body cleaner on it. never spray the throtal body. probably needs replaced. try a junk yard ?

Posted on Sep 01, 2010

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2009 Camry 5 Speed Manual trans. Has a rough, low idle below 500 RPM whats the cause?


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Correct code P0504?


What Colorado do you have ? 2 wheel or 4 wheel drive ? Sport ,sport LS 3.5L , Z71, Z71 LS. etc. what size engine ? an does it have electronic throttle control ? I have factory service info an it is not showing that code .
DTC P0506

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0506 Idle Speed Low
DTC P0507

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0507 Idle Speed High
Cleaning the throttle body mite take care of it !
Cleaning Cleaning An Electronic Throttle Body Safely

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1 Answer

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Sounds like your idle air control valve is going out on you. The IAC is located on the throttle body which is where the air duct tube ends coming from the air filter. It is held on by a couple of screws and is easy to replace. Let me know if you have any questions. Thanks for rating my response and for using FixYa!

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1 Answer

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when you clean it make sure that you hold the butterfly open so you can get the spots clean that need it. If there is anything in the way the butterfly will not close. Just a small bit of dirt will do this .

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