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Home >> Lexus >> 2004 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 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 on 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 P0220 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT, DTC P0222 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT LOW INPUT, DTC P0223 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT HIGH INPUT, DTC P2135 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A"/"B" VOLTAGE CURRELATION  .

Fig 1: DTC Detection Condition/Possible Cause Chart
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