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Home >> Toyota >> 2005 >> Matrix Base, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (SFI) (1ZZ-FE(4WD)) - Diagnostics >> SFI System (1ZZ-FE (4WD)) >> 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 .

P0121 - TROUBLE DETECTION CHART

DTC No. DTC Detection Conditions Trouble Areas
P0121 After vehicle speed exceeds 18.6 mph (30 km/h) once, TP sensor voltage output deviates from the standard range when throttle valve closed at 0 mph (0 km/h) on 4 occasions (2 trip detection logic) TP sensor
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