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2018 MAZDA MAZDA3

2.5L I4FWDAUTOMATICgas
4 active safety recalls on this vehicle — view recalls
Repairs0Labor473Torque4924Fluid6DTC917Battery0Maintenance0Recalls4
P1100moderate severityPowertrain

Mass Air Flow Sensor Circuit Intermittent

on 2018 Mazda Mazda3 2.5L I4 · FWD

What this code means

The Mass Air Flow sensor signal is intermittent. The PCM has detected erratic or fluctuating readings from the MAF sensor that drop in and out during operation, causing inconsistent fuel metering.

Symptoms

  • Check Engine Light
  • Intermittent rough idle
  • Hesitation on acceleration
  • Stalling
  • Erratic fuel economy

Common causes

  • Loose MAF sensor connector
  • Damaged MAF sensor wiring
  • Dirty MAF sensor element
  • Cracked air intake tube allowing unmetered air
  • Failing MAF sensor

Diagnostic steps

  1. Inspect MAF sensor connector for looseness or corrosion
  2. Wiggle test MAF wiring while monitoring live data
  3. Inspect air intake tube for cracks or loose clamps
  4. Clean MAF sensor with MAF-specific cleaner
  5. Monitor MAF readings for erratic behavior

Repair notes

Clean the MAF sensor first; if the problem persists, inspect wiring and replace the MAF sensor.

Other Powertrain codes on this vehicle

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