P0101 – Mass Air Flow (MAF) Sensor Performance

Description

The MAF sensor signal is out of expected range.

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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

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