Chevrolet P1191: Intake Air Duct Leak
Is your scanner showing Chevrolet P1191?
No worries. We'll show you what it means and how to deal with it.
Chevrolet P1191: Intake Air Duct Leak
OVERVIEWWhat Does The Chevrolet 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 calibarteted value (internal to PCM).
What Are The Potential Causes Of The Chevrolet 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.
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> MOSTPLUS High Performance Mass Air Flow Sensor MAF
>>> Positive Crank Ventilation (PCV) Valve Pipe with Bypass Valve Tube
>>> Chevrolet Intake Manifold Gasket
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
Chevrolet P1191, DTCDECODE.
