2006 Chevrolet Impala Logo
Posted on Dec 17, 2009
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I got code p2176 I changed out the tps still got same problem did not have this problem with other engine just changed engine out now cant seem to get this code off causing the car to rough idle and low power

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  • chillen4 Dec 17, 2009

    I did change out a couple sensors but not all of them but i will try the idle air control and hope it works

  • chillen4 Dec 17, 2009

    I changed out the iac still same problem hmmm I just don't know tryed every thing can any one help?? any ways thanks for the help.

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P2176=Throttle Actuator Control System - Idle Position Not Learned
Did you use all you old sensors,or is some of them from the new engine,I would swap out the IAC sensor or check for wires not hooked up.
If it can't relearn to idle the Idle air control might be different then your old one,but its not registering with the computer

  • taydog28 Jul 13, 2011

    try checking the vehcile speed sensor wires right by the pass side output shaft they rub on the steering rack and cause this same problem...

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  • Posted on Jun 15, 2010
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2006 chevy impala LT 3.5 V6. DTC P2135 and P2176. Engine power reduced has been happening intermitently. Shut the car off, wait a minute and restart. Starts and runs, engine light stays on and then goes off after sitting for a while. Paid chevy for a diagnostic and also to clean throttle body and reprogram. Was told if it continued happening I would need a new throttle body. Engine power reduced happened today, just one day after having chevy clean throttle body. Is replacing the throttle body the only fix?

  • 1 more comment 
  • kriseroo Dec 14, 2010

    I am about to replace the throttle body on my 06, but not sure if I need to relearn the computer to the new part..anyone know

  • ccmjem Dec 21, 2010

    Our 2006 impala has the exact problems. Did replacing the throttle body fix the problem? Hate to pay $500 for the repair if it doesn't work, but need to get the car going and reliable again! thanks for any help.

  • pooh01 Jan 01, 2011

    my car is doing the same thing, did replacing the throttle body help. I was told that is what i need to do! Thanks

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