What P0101 means
Mass or Volume Air Flow Sensor A Circuit Range/Performance
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P0101:
| AUDI | Large vacuum leaks, Split Intake Air Boot or PCV Hose, Defective intake manifold gaskets, Mass Airflow Sensor (MAF), Mass Air Flow Sensor circuit and or wiring problems, Defective Barometric Pressure Sensor, Dirty or contaminated Mass Air Flow Sensing wire or filament, PCM software needs to be updated |
| BMW | Mass or Volume Air Flow Circuit Range/Performance |
| FIAT | mass air flow sensor, |
| FORD | Mass Air Flow Circuit Range/Performance Problem |
| GM | Mass Air Flow (MAF) Sensor Performance |
| HONDA | Mass Airflow (MAF) Sensor Range/Performance Problem |
| MITSUBISHI | Mass or Volume Air flow Circuit Range/Performance Problem; AFS range |
| NISSAN | Mass or Volume Air flow Circuit Range/Performance Problem |
| VOLKSWAGEN | Mass Air Flow (MAF) Sensor Performance |
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