LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Scion >> 2009 >> tC Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Remove, Overhaul & Install >> 2AZ-FE Engine Control System >> SFI System >> DTC P2121 Throttle/Pedal Position Sensor/Switch "D" Circuit Range/Performance >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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

HINT:

This DTC relates to the Accelerator Pedal Position (APP) sensor.

Refer to DTC P2120 (See DTC P2120 THROTTLE/PEDAL POSITION SENSOR/SWITCH "D" CIRCUIT; DTC P2122 THROTTLE/PEDAL POSITION SENSOR/SWITCH "D" CIRCUIT LOW INPUT; DTC P2123 THROTTLE/PEDAL POSITION SENSOR/SWITCH "D" CIRCUIT HIGH INPUT; DTC P2125 THROTTLE/PEDAL POSITION SENSOR/SWITCH "E" CIRCUIT; DTC P2127 THROTTLE/PEDAL POSITION SENSOR/SWITCH "E" CIRCUIT LOW INPUT; DTC P2128 THROTTLE/PEDAL POSITION SENSOR/SWITCH "E" CIRCUIT HIGH INPUT; DTC P2138 THROTTLE/PEDAL POSITION SENSOR/SWITCH "D"/"E" VOLTAGE CORRELATION ).

DTC DETECTION CONDITION CHART

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)
  • APP sensor
  • ECM