Question about Chevrolet TrailBlazer

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07 trailblazer. replaced the throttle body actuator and still wont come out of limp mode. Rough idle. ???

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  • Chevrolet Master
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After you replaced the throttle actuator did you erase the code?

Posted on May 13, 2017

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  • Chevrolet Master
  • 11,724 Answers

Code's stored ? APP - Accelerator Pedal Position Sensors Electronic throttle control ! Do yourself a favor an take it to a qualified repair shop .
017 Accelerator Pedal Position Sensors

Posted on May 13, 2017

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  • Jeff Armer May 13, 2017

    https://www.youtube.com/watch?v=Vpn98wx-...

  • Jim Hutson
    Jim Hutson May 21, 2017

    My problem was a broken wire on the blue terminal going to the PCM. Apparently a common problem with Trailblazers, but a serious pain finding this out. Would throw all kinds of weird codes just to keep you guessing. I will say that you are right by saying "take it to a professional" with the proper diagnostic tools. But don't take it to a dealership! They will over charge you beyond belief. I found my local garage did just fine. $130.44 total. Thanks

  • Jeff Armer May 21, 2017

    Good ! glad it's sorted out .

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1 Answer

Not getting throttle response. Truck limps Check engine code reads that it is "Throttle body actuator motor." So I replaced the entire throttle body and the symptoms are still there. What is wrong?


You did not follow the diagnostics for the fault code, fault codes indicate what system has a problem but not what particular part of the system, just that a problem exists in the throttle control system. You need to have this diagnosed with a factory scanner

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What about the Idle Control Valve I know these are a common fault on Ford's, if so you should be able to get away with taking it off and cleaning with something like carb cleaner. Maybe fuel filter needs changing is that the one you meant you changed?

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03 ls it went into failsafe mode. The code was p2100 throttle actuator circuit open. p2110 I changed all coils an throttle body. Still in failsafe mode an rough idle an nuthing when I press the gas.


Sorry to say, But... This is why you don't let parts stores read the codes and you buy parts replace them them, and they are good. Even garages do this. I do this at home. Your problem could be the APP sensor, the throttle body module, wiring , or the PCM. Find a new shop.

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2002 Trailblazer rough idling


First try cleaning the throttle body,make sure you take it off the intake manifold so that the rear side gets cleaned as well. While doing the cleaning, disconnect the battery so that the PCM will reset and relearn to the freshly cleaned throttle body.

Dec 18, 2012 | 2002 Chevrolet TrailBlazer

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P0508 code on 2001 Honda CR-V how do I troubleshoot


Hello,

P0508 = Idle Air Control System Circuit Low

Symptoms:
Engine Light ON (or Service Engine Soon Warning Light) - Engine hard to start - Rough or erratic idle speed.

Causes:
Dirty throttle body - Electric throttle control actuator misadjusted or damaged - Faulty Electric throttle control actuator - Intake air leak - Poor electrical connection to the Intake Air Control (IAC) valve.

Solution:
If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. If the code comes back you may have to replaced the Electric Throttle Control Actuator (Motor) to repair the problem.


I hope this helps!

Mike

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My 2004 Trailblazer started idling rough today. We changed the battery approx a week ago. How can we fix this? Thank you.


By chance, did it start idling rough while you had the defroster on, or the A/C? This is a very common problem after the battery is disconnected AND the defroster or the A/C is on. The defroster uses the A/C to dry the air. To fix this, spend about $7 on a can of throttle body cleaner. Disconnect your battery again, and clean your throttle body. After finished, reconnect the battery and drive for about 5 miles with the defroster or A/C off, this will allow the computer to reset and relearn the newly cleaned throttle body. When you changed your battery, you computer reset and thought the throttle body was clean, therefore you get rough idling when the defroster or A/C is on.

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1 Answer

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Your SUV has an electronic throttle body. Unlike the other type which is driven by cable, this relies on multiple sensors in the gas pedal and multiple sensors in the throttle body. If one or more of the sensors don't agree (i.e: one sensor says you're at 80% it while another says 40% throttle) then it goes in to a default mode or "limp home" mode. It basically makes you take it to be repaired because it is unsafe to be driven.

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1 Answer

Rough Idle 2002 Trailblazer 4.2L could it be the cam solenoid? It shows no code or service engine light but the idle is very rough


Clean throttle body first, make sure you disconnect battery foe about 30 minutes so PCM can relearn to cleaned throttle body.

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1 Answer

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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.

Jul 21, 2009 | 2006 Chevrolet Trailblazer

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