Question about 2006 Chevrolet Trailblazer

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2006 trailblazer- low idle code, flickering lights

The check engine light comes on from time to time, and the code is low idle. Also, the lights flicker when I pull up to stoplights and stuff. All the lights, including interior, along with the heater quickly progress to high voltage and then flash back to dim. A good analogy would be that it's like the volume on a computer being turned up to full volume and then suddenly resetting at low. I just replaced the battery which was shot, and the alternator tested out fine so I didn't replace it. Replaced the air filter as well. Sometimes I can hear the high pitched noise of electricity. Am I possibly dealing with two problems?

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It may be caused by the low idle clean the throttle body also check the idle air control valve. the alternator is not spinning fast enough to produce rite amount of volts to your lights.

Posted on Dec 02, 2012

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Posted on Jan 02, 2017

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SOURCE: idle problem on a 2006 chevy trailblazer 4.2

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

  • 196 Answers

SOURCE: Rough Idle - 1997 Cavalier RS 2.2L SFI-OHV 4-134

WEll it is possible it could be the idle air control. one the most comon problems is the fuel pressure regulator. To check it find the fuel rail the fuel regulator will have one vacuum hose on it remove the hose and check to see if it is wet with fuel if not have some one trun the key on or start the car if it leaks fuel out the regulator is bad. This would explain why its hard to start when it sits because it floods out the motor

Posted on Jan 11, 2009

  • 124 Answers

SOURCE: flickering headlights

Check with a GM dealer to see if there is repair bulletin on the voltage regulator in the alternator.

Posted on Dec 16, 2008

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SOURCE: 2006 trailblazer po 411 code check engine light comes on and off over time is it a sensor or the air pump?

Check all your vacume lines one may have a crack in it

Posted on Apr 21, 2009

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SOURCE: 91 S10 rough idle, stalling ALDL problems

Make sure there is no vacuum leaks.


Vacuum leak at intake manifold and vacuum hose.

Bad Idle Air Control Motor (IAC)

Low compression (170 psi + is OK)

Start cleaning and repair these trouble spots and see is there any improvement.

====

For more advance DIY'er then you may try this.

Use a can of Berryman carburetor clean to locate the vacuum leak.


SEE SAMPLE PICTURE HERE


This is a 20-30 minutes job.

Vacuum leaks can occur in following locations.


Intake manifold AND/OR vacuum lines.


Intake manifold is not accessible unless the engine head if off.

You can still check the potential leak by spraying some Berryman near the intake manifold.

Listen for rpm increase after you introduce the Berryman (FUEL) at idle.


Do the same starting from the brake booster unit (the round unit) on the drive side fire all.

Carefully listen for increase of RPM right after to spray the Berryman to the potential vacuum spot.

Get a friend to HEAR the RPM increase or monitor for RPM on the tech.

DO NOT AIM the Berryman into any heat source.


PLEASE RATE my answer if it is useful to you.

Posted on Dec 17, 2009

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In order to know what fault code is stored there, I suggest scanned the PCM to know it. Note this code number and send us for diagnostic additional and solution details .

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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.

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