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Home >> Scion >> 2004 >> xB Automatic >> Repair and Diagnosis >> Engine Performance >> System >> SFI System - Diagnosis >> DTC P0121: Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem >> Circuit Description
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Circuit Description

Refer to DTC P0120 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT, DTC P0122 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT LOW INPUT, & DTC P0123 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT HIGH INPUT  .

DTC P0121 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT RANGE/PERFORMANCE PROBLEM

DTC No. DTC Detection Condition Trouble Area
P0121 After the vehicle speed has exceeded 19 mph (30 km/h) once, when output voltage of throttle position sensor which indicates "closed throttle position" deviates from applicable range (4 times or more)
  • Throttle position sensor (built in throttle body)
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