Ford YC2Z-12B579-BBRM
Mass Air Flow Sensor

Begin any repair process on the Mass Air Flow (MAF) Sensor by disconnecting the battery ground cable. After opening the engine air cleaner you should disconnect the electrical connector which connects to the MAP sensor. Untighten the air cleaner clamp then divide the air cleaner into inlet and outlet parts yet maintain the MAF sensing elements intact to avoid failure. The MAP sensor along with its body receives calibration and repair as a unified unit. To proceed you must first disconnect the MAF assembly yet keep the MAF sensor electrical connection detached and use the nuts to split the MAF sensor away from the MAF sensor plate. When putting back these components keep the engine air cleaner housing grommet fully seated to stop unmetered air from entering the engine. The alignment notch should guide alignment of the engine air cleaner's inlet and outlet areas while checking that wires do not get trapped behind the MAF sensor before reinstalling and tilting the electrical connector upward.

Ensure that the wires are not trapped behind it and that the electrical connector is pointing up.

Disconnect the battery ground cable.

Disconnect the MAF sensor electrical connector and remove the nuts to separate the MAF sensor from the MAF sensor plate.

They are calibrated and serviced as a unit.

Disconnect the MAF sensor electrical connector, release the air cleaner clamp, and separate the inlet side from the outlet side of the air cleaner.

Use the alignment notch to properly align them.

First, disconnect the battery ground cable.

Disconnect the MAF sensor electrical connector from the wiring harness, release the air cleaner clamp, and separate the inlet side of the air cleaner from the outlet side.

First, disconnect the battery ground cable.

Release the air cleaner clamp and separate the inlet side from the outlet side.