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Home >> Lexus >> 2003 >> IS 300 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P2121: Throttle/Pedal Position Sensor/Switch "D" Circuit Range/Performance >> Circuit Description

Circuit Description

For circuit description, see CIRCUIT DESCRIPTION  under DTCs P2120, P2122, P2123, P2125, P2127, P2128 OR P2138. DTC P2121 is set when difference between VPA and VPA2 is out of threshold and condition continues for .5 seconds. Possible cause is a faulty accelerator pedal position sensor.

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