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    Accelerator Pedal Position Sensor

    Mandy Concepcion

    by Mandy Concepcion

    Describes the operation of the APP or accelerator position sensor. The APP sensor is found in almost every vehicle today. This is a component of the Drive-By-Wire system, which does away with the throttle cable. In a DBW system, the ECM receives an input from the APP sensor and then commands the appropriate throttle opening using a throttle actuator motor. See how this device works with this video. Then, go further and view our other video on how to test the APP sensor.