Question about 2006 Chevrolet Trailblazer Ext
P0506 - Idle Air Control (IAC) System RPM Lower Than Expected
What does that mean?
This P0506 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0506 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is lower than the desired (pre-programmed) RPM.
Most likely the only thing you'll notice is the idle speed is lower than normal so it will likely be rougher. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.
A P0506 DTC trouble code may be caused by one or more of the following:
* A vacuum leak
* An air restriction in the intake air path or exhuast
* A faulty positive crankcase ventilation (PCV) valve
* Damaged/failed/dirty throttle body
* Internal engine problem
* Failed PCM
This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect for vacuum leaks, restrictions, and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns.
Posted on May 29, 2010
Clean the Throttle Body.
Lynn Auto Repair
Posted on Jun 11, 2013
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 12, 2016 | Cars & Trucks
Mar 30, 2014 | Cars & Trucks
Jan 25, 2014 | 2006 Chevrolet Trailblazer
Aug 24, 2011 | 2006 Chevrolet Trailblazer
Jul 13, 2010 | 2006 Chevrolet Trailblazer
Aug 31, 2009 | 2006 Chevrolet Trailblazer
Jul 21, 2009 | 2006 Chevrolet Trailblazer
6,913 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: