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Home >> Isuzu >> 1996 >> Hombre S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Circuit Testing >> DTC P0121 - TP Sensor System Performance >> Circuit Description
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Circuit Description

Powertrain Control Module (PCM) supplies a 5-volt reference signal and a ground circuit to Throttle Position (TP) sensor. TP sensor signal voltage should be about .5 volt at idle and 4.5 volts or more at wide open throttle.

Conditions required to set DTC: