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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Control System & Fuel System - 6.6L (LLY) - Introduction (2 Of 2)) >> Description and Operation >> Accelerator Pedal Position System Description >> Accelerator Pedal Position (APP) Sensor

Accelerator Pedal Position (APP) Sensor

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The APP sensor is mounted on the accelerator pedal control assembly. The sensor is made up of 2 individual sensors within one housing. Two separate signal, low reference, and 5-volt reference circuits are used in order to interface the accelerator pedal sensor assembly with the engine control module (ECM). Each sensor has a unique functionality to determine pedal position. The ECM uses the APP sensor to determine the amount of acceleration or deceleration desired by the person driving the vehicle. The APP sensor 1 voltage should increase as the accelerator pedal is depressed, from below 1.0 volt at 0 pedal travel to above 4 volts at 100 percent pedal travel. APP sensor 2 voltage should increase from above 0.43 volts at 0 pedal travel to above 2.0 volts at 100 percent pedal travel.

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