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Home >> Chevrolet >> 2006 >> SSR Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 6.0L - DTC P0016 To DTC P0135 >> DTC P0120 >> Circuit Description
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Circuit Description

The throttle position (TP) sensors 1 and 2 are located within the throttle body assembly. Each sensor has the following components:

This provides the engine control module (ECM) with a signal voltage proportional to throttle plate movement. TP sensor 1 signal voltage at closed throttle is near the 5-volt reference and decreases as the throttle plate is opened. TP sensor 2 signal voltage at closed throttle is near the low reference and increases as the throttle plate is opened. If the ECM detects the TP sensor 1 signal voltage is not within the predicted range, DTC P0120 sets.

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