Mass Air Flow (MAF) Sensor
WARNING: This page is about a different car, the 2003 Mercury Sable and 2003 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The mass air flow (MAF) sensor directly measures the mass of the air flowing into the engine. The sensor output is a DC (analog) signal ranging from about 0.5 volt to 5.0 volts by the PCM to calculate the injector pulse width for the correct air fuel combustion ratio. The MAF sensor input is used for EPC pressure control, shift and torque converter clutch (TCC) control.