Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Electronic Engine Controls




Electronic Engine Controls


Mass Air Flow (MAF) Sensor

The MAF sensor:

- sends the PCM a signal indicating mass airflow rate of air entering the engine.
- incorporates the Intake Air Temperature (IAT) sensor.

For removal and installation, refer to Mass Air Flow (MAF) Sensor Service and Repair.