Air Flow Meter/Sensor: Description and Operation

1999 Ford Escort ZX2 L4-2.0L DOHC VIN 3SECTION Description and Operation





The Mass Air Flow (MAF) sensor measures the mass of the air flowing into the engine. The Powertrain Control Module uses the MAF sensor signal to calculate the fuel injector pulse width.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.