Monte Carlo V6-3.4L VIN E (2000)
Mass Air Flow (MAF) Sensor: Description and Operation
The Mass Air Flow (MAF) sensor measures the amount of air which passes through it. The PCM uses this information to determine the operating
condition of the engine, to control fuel delivery.
A large quantity of air indicates acceleration, while a small quantity indicates deceleration or idle.
The scan tool reads the MAF value and displays it in grams per second (gm/s). At idle, it should read between 4 gm/s to 6 gm/s on a fully warmed up
engine. Values should change rather quickly on acceleration, but values should remain fairly stable at any given RPM. A failure in the MAF sensor or
circuit should set DTC P0101 Mass Air Flow (MAF) Sensor Performance, DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency, or DTC
P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency
The MAF sensor is attached to the front (air inlet side) of the throttle body and is used to measure the amount of air entering the engine. The PCM uses
this information to determine the operating condition of the engine and to control fuel delivery. For further information, refer to Information
Sensors/Switches Description. See: Computers and Control Systems/Description and Operation/Information Sensors/Switches
