E 450 V8-6.0L DSL Turbo VIN P (2004)
Air Flow Meter/Sensor: Description and Operation
MASS AIR FLOW SENSOR
Typical Mass Air Flow (MAF) Sensor
Mass Air Flow (MAF) Sensor (E-Series)
The mass air flow (MAF) sensor provides an analog voltage signal to the PCM proportional to the intake air mass. The MAF sensor utilizes a hot wire
sensing element to measure the amount of air entering the engine. The hot wire is maintained at 200°C (392°F) above ambient temperature. Air passing
over the hot wire cools the wire. The current required to maintain the temperature of the hot wire is proportional to the air mass flow. The MAF signal is
used to calculate exhaust gas recirculation (EGR) and for fault detection.
