What are the possible causes of p0101 GMC?
What are the possible causes of p0101 GMC? P0101 Gmc Possible Causes. Faulty mass air flow sensor. Intake air leaks. Dirty mass air flow sensor. Dirty mass air filter. Mass air flow sensor harness is open or shorted. Mass air flow sensor circuit poor electrical connection. When to set the p0101 mass air flow code? The P0101 code is set when the Powertrain Control Module (PCM) detects that the Mass Air Flow (MAF) sensor frequency is below a predetermined value. The Mass Air Flow (MAF) sensor measures the amount of air ingested by the engine. When to use check engine...