AutoCodes – Jeep – P1D74 Jeep

P1D74 Jeep Code - Gear Shift Actuator 'B' Position Out Of Range

Quick Answer

This diagnostic compares the gear shift actuator 2nd-4th position to a minimum and maximum threshold values of allowable mechanical positions. Common causes include Transmission Hydraulic System, Transmission Mehanical Operation, Faulty Transmission Control module (TCM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1D74 Jeep indicates Gear Shift Actuator 'B' Position Out Of Range.
Common causes: Common causes include Transmission Hydraulic System, Transmission Mehanical Operation, Faulty Transmission Control module (TCM).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,147

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1D74 Jeep 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.

OBDII Code P1D74 Jeep - Gear Shift Actuator 'B' Position Out Of Range - AutoCodes.com — P1D74 Jeep Code - Gear Shift Actuator 'B' Position Out Of Range

What does this mean?

What are the Possible Causes of the DTC P1D74 Jeep?

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

How to Fix the DTC P1D74 Jeep?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1D74 Jeep code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1D74 Jeep Code

1. What does the OBDII code P1D74 mean on a Jeep?

The P1D74 code indicates that the Gear Shift Actuator 'B' Position is out of range, meaning the actuator is not moving or reporting its position as expected.

2. What are the common symptoms of code P1D74 in a Jeep?

Symptoms may include difficulty shifting gears, the transmission stuck in one gear, the check engine light turning on, or erratic shifting behavior.

3. What causes the P1D74 code to appear?

Common causes include a faulty gear shift actuator, wiring or connector issues, transmission control module (TCM) problems, or mechanical failure in the transmission.

4. Can I drive my Jeep with the P1D74 code active?

Driving with this code may cause shifting issues and potential damage to the transmission. Itâ€™s best to address the issue as soon as possible to avoid further complications.

5. How do you diagnose the P1D74 code on a Jeep?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the gear shift actuator and its wiring, and testing the actuator's functionality with a multimeter or specialized diagnostic tools.

6. How do you fix the P1D74 code?

Repairs may include replacing the faulty gear shift actuator, repairing damaged wiring or connectors, updating or reprogramming the TCM, or addressing mechanical issues in the transmission.

7. Is the P1D74 code specific to Jeeps?

While the code is specific to manufacturers like Jeep and other FCA (Fiat Chrysler Automobiles) vehicles, the issue it represents can be found in other vehicles under different code numbers.

8. What tools are needed to troubleshoot the P1D74 code?

An OBDII scanner, a multimeter, and possibly manufacturer-specific diagnostic tools are needed to investigate and resolve the issue.

9. How much does it cost to repair a P1D74 code on a Jeep?

Costs can vary depending on the root cause. Replacing a gear shift actuator may cost $300â€“$700, while wiring repairs or reprogramming the TCM may cost less.

10. Can a software update fix the P1D74 code?

In some cases, a TCM software update may resolve the issue if itâ€™s related to a programming or calibration problem. A dealership or qualified shop can perform this update.