P0101 – Mass Air Flow (MAF) Sensor Performance

Description

The MAF sensor signal is out of expected range. For diagnosis, compare airflow with related values using our OBD2 Live Data guide.

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Symptoms

Rough idle
Hesitation
Poor acceleration
High fuel trims
Check engine light

Causes

MAF contamination
Vacuum leaks
Air intake leaks
Faulty MAF sensor
Exhaust leaks

Diagnosis

Inspect MAF wiring
Check fuel trims
Smoke test intake
Test MAF sensor
Inspect air filter

Repair

Clean or replace MAF
Fix vacuum leaks
Repair intake leaks
Replace air filter
Repair exhaust leaks