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Home › Lexus › 1995 › LS 400 › Repair and Diagnosis (Single Page) › Engine Performance › System › Engine Controls - Tests W/Codes - OBD-II › Diagnostic Testing › Code P1401: Sub-Throttle Position (Sub-TP) Sensor Circuit Range/Performance Problem › Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

If only Code P1401 is displayed, replace SUB-TP sensor and retest. If other codes are displayed, diagnose and repair those codes first and retest.