GMC P1191: Intake Air Duct Leak
Is your scanner showing GMC P1191?
No worries. We'll show you what it means and how to deal with it.
GMC P1191: Intake Air Duct Leak
OVERVIEWWhat Does The GMC P1191 Code Mean?
Conditions for Setting the DTC.
DTCs P0405, P0406, P0102 and P0103 are not set.
All EGR tests have been completed (internal to PCM). Intake leak greater than calibrated value (internal to PCM)
What Are The Potential Causes Of The GMC P1191 Code?
The most likely cause of failure is a leaky intake duct after the MAF sensor. To run the diagnostic test the engine must be at operating temperature, vehicle in drive at idle for approximately 1 minute, then with vehicle in park hold engine rpm steady bet
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Whisper, Ultrasonic Leak Detector, 711-202-G1
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
Technical Service Bulletin PIP5094 for P1191 – General Motors, February 2023
