Question about 2008 Chevrolet Trailblazer
Posted by Anonymous on
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.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
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
The code indicates an issue with the Throttle Actuator control. This is a little motor on the throttle body that opens the throttle plates at idle. That control motor may be bad and thus, causing a low idle.
I hope this helps.
Posted on Jul 21, 2009
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
SOURCE: I have a 2006 Chevrolet
Crankshaft Position Sensor "A" Circuit
P0506 Idle Air Control System RPM Lower Than Expected
P2119 Throttle Actuator Control Throttle Body Range/Performance
P2431 Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance
The last 3 I believe are all just piling on caused by the first. Once there is a problem with the crankshaft position sensor, in effect the engine timing is changing all by itself.
Which obviously can run really badly, causing all the other codes. It causes low idle, the drive by wire throttle actuator to be unable to make a difference, and the engine will slow to the point the air pump with not work.
I would suggest replacing the crankshaft position sensor or taking it into a place like Autozone to see if they can tell it is bad or not.
Posted on Jan 25, 2011
SOURCE: I went to a local
Definitely clean that throttle body...can do it yourself for around $7.
Instructions for doing it without removing the throttle body.
1. Disonnect the battery....very important so your stepper motor isn't ruined when moving the butterfly.
2. Remove the plastic resonator on the top of the engine (The black piece that says 4200 on it)
3. Remove the large rubber hose from the throttle body.
4. Clean away, with throttle body cleaner or Seafoam, I just use the blue shop towels to clean in there. Could use a plastic bristle brush also for more elbow grease. Be very careful, as the butterfly will cut you very easily, very sharp edges. Make sure you get all the gunk out of there, including any edges of gunk that may have formed, preventing the butterfly from opening and closing properly. Needs to be nice and shiny.
5. Hook the resonator and hoses back up, don't forget the little pcv hose on the front right corner of it.
6. Hook the battery back up and drive around for 20 minutes or so with all accesories OFF. The computer will relearn a properly functioning throttle body at that point.
7. Enjoy a little bettery gas mileage and horsepower
As far as the injector cleane....Buy a $10 can of Seafoam, that will clean the injectors. Look on Youtube on how it works, good stuff.
Posted on Feb 21, 2011
SOURCE: chevy trailblazer 2007 P0506 &
Cleaning your throttle body should take care of both problems. Clean your throttle body with throttle body cleaner. First disconnect the battery, clean the TB with TB cleaner, must be nice and shiny. When finished, hook the battery back up and drive around for 20 minutes or so with all accessories off, so the computer will relearn a properly functioning throttle body.
Your computer learned some bad habits, so when you changed the battery, the computer thought the throttle body was clean and functioning properly. So when you changed it, this caused all your problems. Very common, keep your throttle body clean, should be done at least once a year. Total cost if you do it yourself is around $5, for the can of TB cleaner.
Posted on Apr 25, 2011
Tips for a great answer:
Aug 23, 2014 | 1999 Volkswagen Beetle
Jun 30, 2011 | 2006 Chevrolet Trailblazer Ext
Jun 20, 2011 | 2001 Saturn L-Series
Sep 09, 2010 | 2005 Ford Mustang
Jul 31, 2010 | 2003 Ford Expedition
Jun 28, 2010 | 2006 GMC Envoy Xl
May 29, 2010 | 2006 Chevrolet Trailblazer Ext
Dec 06, 2009 | 2000 Cadillac DeVille
Oct 04, 2016 | 2008 Chevrolet Trailblazer
536 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: