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Home >> Lexus >> 2003 >> GS 430 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0121: Throttle Position (TP) Sensor/Switch "A" Circuit Range/Performance Fault >> Diagnosis & Repair

Diagnosis & Repair

Replace TP sensor and retest. See THROTTLE BODY under FUEL SYSTEM in REMOVAL & INSTALLATION - EXCEPT GX470 article.

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