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Home >> Lexus >> 1998 >> GS 400 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Tests W/Codes >> Diagnostic Tests >> DTC P0121: Throttle Position (TP) Sensor Circuit Range/Performance Problem >> Diagnosis & Repair
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Diagnosis & Repair

Replace TP sensor and retest.