LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2003 >> ECHO 2D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self Diagnostics >> Diagnostic Tests >> DTC P0121: Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem >> Circuit Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit Description

For circuit description, see DTC P0120, DTC P0122 & DTC P0123 .

Detecting condition of DTC is when after vehicle speed has exceeded 19 MPH even once, output value of throttle position sensor is out of applicable range while vehicle speed is 0-19 MPH (2 trip detection logic).