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Home >> Lexus >> 1996 >> LS 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Circuit Tests >> DTC P1401 - Sub-Throttle Position (Sub-TP) Sensor Circuit Range/Performance Problem >> Circuit Description
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Circuit Description

The SUB-TP sensor is similar to the main TP sensor. SUB-TP sensor is used for Traction Control System (TRAC). DTC is set when ECM consistently detects more than 2 volts from VTA2 circuit and closed SUB-TP switch is on. Possible cause is:

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