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Home >> Lexus >> 2002 >> ES 300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0121: Throttle Position Sensor Circuit Range/Performance >> Circuit Description
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Circuit Description

Throttle Position (TP) sensor is mounted to throttle body and it has 2 sensors to detect throttle opening angle. ECM determines current opening angle of throttle valve from signals input from terminals VTA1 and VTA2, and ECM control throttle motor to make throttle valve angle properly in response to driving condition.