Mass Air Flow Sensor MAF
Mass Air Flow Sensor (Appearance will vary.) Step 2 - All maf sensors include an electrical connector which is used to transfer data to the computer.
Mass Air Flow Electrical Connector Step 3 - A hot wire is used to detect air flow by measuring the resistance change as varying amounts of air are passed over it.
Mass Air Flow Hot Wire
Wiring Diagram Helpful Information A mass air flow sensor can become inaccurate after large amounts of air (high mileage) has passed over the hot wire and must be cleaned before normal operation will return. These sensors are delicate and are prone to failure, fortunately replacement is simple in most cases. Engine performance issues involving this sensor include, hesitation, low power and poor mileage.