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Home >> Lexus >> 2001 >> LX 470 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0120: Throttle (TP)/Pedal Position Sensor Switch "A" Circuit Malfunction >> Circuit Description

Circuit Description

TP sensor is located on throttle body and has 2 variable resistors integral to TP sensor. TP sensor monitors throttle pedal position. ECM determines vehicle driving condition and adjusts throttle valve position accordingly. DTC is set when ECM detects voltage is out of range on VTA or VTA2 circuits. Possible causes are:

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