← Look into the faults of the GMC Yukon XL
Trouble code
P0068: possible causes and documented repairs — 2000–2006 GMC Yukon XL
No record of the 2000–2006 GMC Yukon XL states trouble code P0068. What follows is what the technical documents say. The technical documents say how to deal with 1 of its possible causes. They are listed by the number of matching records, most first.
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Causes the technical documents say how to deal with (1)
Throttle body carbon build-up: idle surge, reduced engine power, throttle DTCs (high mileage)
No matching record (stated by the technical documents)
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.
With enough carbon, idle surge, deceleration surge, tip-in hesitation, reduced engine power mode and/or DTCs may occur.
How to tell
What to do
- If SI diagnosis does not isolate the cause, inspect the throttle body bore and plate for obvious carbon build-up.
- If carbon is present, follow the Throttle Body Cleaning Procedure in SI.
- Depending on the vehicle, 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.
- After ensuring that the throttle body bore and plate are clean, perform an idle learn reset/reset idle learn with the Tech 2/GDS and re-evaluate the concern.
Related symptoms, trouble codes and warning displays
What the technical documents state together with the faults above.
- Warning display
- Check engine / Service Engine SoonReduced Engine Power
Put together by FaultCrate from public records and technical documents. The cause and the repair are for the workshop to decide with the vehicle in front of it. Counts are records, not failure rates.