fixx
 

scratch!! didnt see the 2007 part lol,,i forgot that one has a gear box lol...

SES Light, Idle Surge, and/or Reduced Engine Power Mode with DTCs P0068, P0121, P0506, P0507, P1516, P2101, P2119, and/or P2176 - Clean Throttle Body and Perform Idle Learn reset








This PI was superseded to update model years and add information concerning idle surge, reduced engine power mode, and/or DTCs P0068, P0121, P1516, P2101, P2119, and/or P2176 that may be experienced on high mileage vehicles. Please discard PIP4578.
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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:


As carbon builds up in the throttle body of a high mileage vehicle, the ECM/PCM learns to compensate by increasing the throttle plate angle.

If enough carbon builds up, an idle surge, deceleration surge, tip-in hesitation, reduced engine power mode, and/or DTCs P0068, P0121, P1516, P2101, P2119, and/or P2176 may be experienced on high mileage vehicles.

If the throttle body is cleaned without performing an "idle learn reset/reset idle learn" with the Tech 2, the ECM/PCM may continue to compensate for previous carbon build up, causing it to return with a similar concern as well as DTCs P0121, P0506, and/or P0507.

In a similar fashion, if the ECM/PCM of a high mileage vehicle is replaced and/or reprogrammed without performing the Throttle/Idle Learn outlined in SI, the ECM/PCM may no longer compensate for existing carbon build up in the throttle body, causing it to return with a similar concern as well as DTCs P0121, P0506, and/or P0507.

Recommendation/Instructions:


If SI diagnosis does not isolate the cause of this concern, inspect the throttle body bore and plate for obvious carbon build up.

If carbon is present, follow the Throttle Body Cleaning Procedure in SI to clean the throttle body.

After ensuring that the throttle body bore and plate are clean, perform an "idle learn reset/reset idle learn" with the Tech 2 and re-evaluate the concern.

Notice: Depending on the vehicle you are working on, the "idle learn reset/reset idle learn" is normally found on the Tech 2 ECM menu for Module Set Up or Special Functions/TAC System.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.





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thats a TSB right my gm service info website

Thanks. I guess I'll take it in. **** like this pisses me off, there is no ****ing reason this needs to be done by the Dealer.

try disconnecting the battery and touching the cables together. then just drive it normally. sometimes that works

I talked to the dealership today and the guy said it was only 109.50 to reprogram the ECM. Said that by pulling the butterfly out that I had possibly REALLY unset the positioning. I don't have time to deal with it now since I'm heading to texas in the morning so I'm just going to drop it off.

If you have a p0121 it more than likely needs a throttle position sensor (the black cover on the side of the throttle body) and cleaning. And an idle learn reset. As far as the 109.50, thats some bull$hit because an idle learn reset is done with the tech 2. Its not an ecm reflash. I personally have never taken the throttle blade off but it could be possible that you have something off a little. Im not sure on that part though. Hope u get it figured out.

tell the dealership you want a print out of the programming after the program is complete. and you want the screen printed that shows the before and after calibrations of the pcm. this way they arent blowing smoke up your a$$. we get an hour for a pcm reflash and idle learn. im guessing the labor rate is 109.50/hr at the dealerhship.

come on guys were all GM techs here,,a hour is not out of line,,the bulletin calls for a reflash on most year trucks,,and even if his truck has the latest calbration in the ecm the only way you would know that is by going thrue the steps,,by the time you bring the car in your stall hook up your MDI and get GDS2 running on your lap top,,run it thrue TIS to verify calibration and then hook up yout Tech2 to relearn min idle you got the hour into it,,+ you have to live with this truck for 3 month of looking it it for free if any other driveability issues arise (come back policy)..


I find it funny how most people have no problem with paying a repair man travel time and a flat hour to come over the house and look at their dishwasher but feel the dealership is screwing them by charging a hour to fix what other shops cant because they have no access to gmglobalconnect....

by the way I have around 5k invested in my Tech2,MDI,Lap top,,so a hour is more then fair I feel

+100