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Home >> Lexus >> 2003 >> IS 300 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0121: Throttle Position (TP) Sensor/Switch "A" Circuit Range/Performance Fault >> Diagnosis & Repair
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Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Lexus GS 430. However, it is still accessible from the selected car via links, so may be relevant.

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

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