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2019 MAZDA MAZDA3
2.5L I4•FWD•AUTOMATIC•gas
6 active safety recalls on this vehicle — view recalls
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Repairs0Labor551Torque3622Fluid6DTC919Battery1Maintenance0Recalls6
P1101moderate severityPowertrain

MAF Sensor Out of Self-Test Range

on 2019 Mazda Mazda3 2.5L I4 · FWD

What this code means

The MAF sensor reading is outside the expected range during the PCM self-test. The airflow value does not match expected parameters for the current engine operating conditions during diagnostic testing.

Symptoms

  • Check Engine Light
  • Poor idle quality
  • Hesitation
  • Poor fuel economy
  • Black smoke from exhaust

Common causes

  • Dirty MAF sensor
  • Vacuum leak after MAF sensor
  • Restricted air filter
  • Faulty MAF sensor
  • Intake air leak between MAF and throttle body

Diagnostic steps

  1. Check and replace air filter if dirty
  2. Inspect intake ductwork for leaks between MAF and throttle body
  3. Clean MAF sensor with approved cleaner
  4. Check for vacuum leaks with smoke test
  5. Compare MAF readings to specification at idle and 2500 RPM

Repair notes

Clean or replace the MAF sensor and repair any intake air leaks.

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Other Powertrain codes on this vehicle

🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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