Gear Shift Actuator ‘B’ Position Out Of Range
Table of contents
P1D74 Possible Causes
- Transmission Hydraulic System
- Transmission Mehanical Operation
- Faulty Transmission Control module (TCM)
How do I fix code P1D74?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1D74 code
The cost of diagnosing the P1D74 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1D74 Description
This diagnostic compares the gear shift actuator 2nd-4th 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.