Mass Air Flow (MAF) Circuit Range/Performance
What it means
The mass-air-flow sensor reading is outside the expected range for current conditions.
Symptoms
Hesitation, rough idle, poor acceleration, higher fuel use.
Common causes
Dirty or failing MAF sensor, intake leak, or a dirty air filter.
Recommended action
Clean the MAF with proper cleaner and check the intake for leaks before replacing it.
Related codes
FAQ — P0101
What does code P0101 mean?
Mass Air Flow (MAF) Circuit Range/Performance. The mass-air-flow sensor reading is outside the expected range for current conditions.
What are the symptoms of P0101?
Hesitation, rough idle, poor acceleration, higher fuel use.
What causes P0101?
Dirty or failing MAF sensor, intake leak, or a dirty air filter.
What should I do about P0101?
Clean the MAF with proper cleaner and check the intake for leaks before replacing it.
General reference based on the SAE J2012 standard. Exact causes for your vehicle may differ — when in doubt, consult a workshop.
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