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Home >> Lexus >> 2004 >> IS 300 Base, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control System - Diagnosis >> Circuit Inspection >> DTC P2120: Throttle/pedal Position Sensor/Switch "D" Circuit, DTC P2122: Throttle/pedal Position Sensor/Switch "D" Circuit, DTC P2123: Throttle/Pedal Position Sensor/Switch "D" Circuit High Input >> Monitor Description

Monitor Description

When either voltage output VPA or VPA2, deviates from the standard ranges, or difference between the voltage outputs of the two sensors is less than threshold, the ECM concludes that there is a defect in the accelerator pedal position sensor. The ECM turns on the MIL and a DTC is set.