2005 Chevrolet Colorado



October, 9, 2008 AT 6:44 PM

Engine Performance problem
2005 Chevy Colorado Four Wheel Drive Automatic 60.000 miles

My check engine light came on with a P0506 code - Idle air control system rpm lower than expected. Several of the option that I found on the web suggest that it could be the PCV valve or the Idle air control Valve (IAC). Can anyone tell me were these are located on a 2005 5 cyl colorado. I did find a site that tells how to test the IAC valve/motor, but I want to make sure I have the correct devices. Thanks


2 Answers


brian 1

October, 10, 2008 AT 9:38 AM

SES Light Due to DTCs P0105, P0106, and/or P0506 - Clean Throttle Body

Models: 2004-2007 Buick Rainier

2002-2007 Chevrolet TrailBlazer

2004-2007 Chevrolet Colorado

2002-2007 GMC Envoy

2004-2007 GMC Canyon

2002-2004 Oldsmobile Bravada

2006-2007 HUMMER H3

2005-2007 Saab 9-7X

with any of the following engines: 2.8L (VIN 8 - RPO LK5)

2.9L (VIN 9 - RPO LLV)

3.5L (VIN 6 - RPO L52)

3.7L (VIN E - RPO LLR)

4.2L (VIN S - RPO LL8)

On rare occasions, a SES light may be experienced due to DTCs P0105, P0106, and/or P0506. There may or may not be an idle complaint accompanying the SES light. This may be due to excessive carbon build up in the throttle body.

Clean the throttle body bore and plate for evaluation



March, 11, 2009 AT 2:27 AM

I had this code pop up at 55K on my 2005 Mustang GT.
What I did to clear this code was clean my TB.
I turned the key to the " on" position (engine not running) and placed weights on my accelerator peddle. This opened the butterfly on my TB. From there I just used carb cleaner and a clean rag to clean the TB. Doesn't have to be a whole lot of gunk to make this code appear.

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