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Home >> Lexus >> 2009 >> IS F >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control (SFI) System (Diagnostic Codes & Circuit Tests) >> SFI System >> DTC P2121: Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance >> Description

DTC P2121: Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance: Description

Refer to DTC P2120. Refer to DESCRIPTION .

DTC No. DTC Detection Condition Trouble Area
P2121 Difference between VPA and VPA2 less than 0.4 V, or more than 1.2 V for 0.5 seconds
(1 trip detection logic)
  • Accelerator pedal position sensor
  • ECM