P1D76 FIAT – Gear Shift Actuator ‘D’ Position Out Of Range

P1D76 FIAT Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1D76 FIAT Possible Causes

Transmission Hydraulic System,Transmission Mehanical Operation,Faulty Transmission Control module (TCM)

P1D76 FIAT Description

This diagnostic compares the gear shift actuator 6th position to a minimum and maximum threshold values of allowable mechanical positions. The actuator position is read by a position sensor which provides an output signal with Pulse Width Modulation (PWM) at a fixed frequency and duty cycle proportional to the position of the actuator. The PWM duty cycle electrical range is between 10% and 90%. If the position sensor signal is within this electrical range but it indicates the actuator position is outside of its expected mechanical travel, then the diagnostic will be considered failing.