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P185F 2014 GMC Sierra Code - Transfer Case Shift Pending Signal Not Plausible

Quick Answer

The P185F diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the transfer case shift pending signal is not plausible. Common causes include Faulty transfer case control module, Damaged wiring or connectors in the transfer case system, Malfunctioning transfer case motor or encoder motor. 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
P185F 2014 GMC Sierra indicates Transfer Case Shift Pending Signal Not Plausible.
Common causes
Common causes include Faulty transfer case control module, Damaged wiring or connectors in the transfer case system, Malfunctioning transfer case motor or encoder motor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P185F 2014 GMC Sierra Description

The P185F diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the transfer case shift pending signal is not plausible. This means that there is a communication issue between the transfer case control module and other vehicle systems, leading to a discrepancy in the signal related to the transfer case shift. The transfer case is a critical component in four-wheel drive and all-wheel drive vehicles, responsible for distributing power between the front and rear axles to optimize traction and stability in various driving conditions.

OBDII Code P185F 2014 GMC Sierra - Transfer Case Shift Pending Signal Not Plausible
P185F 2014 GMC Sierra Code - Transfer Case Shift Pending Signal Not Plausible

Common Causes of P185F 2014 GMC Sierra

  1. Faulty transfer case control module
  2. Damaged wiring or connectors in the transfer case system
  3. Malfunctioning transfer case motor or encoder motor
  4. Communication errors within the vehicle's network
  5. Issues with sensors related to the transfer case shift signal

Symptoms of P185F 2014 GMC Sierra

  1. Difficulty shifting between four-wheel drive modes
  2. Illumination of the service 4WD light on the dashboard
  3. Unusual noises or vibrations when engaging the transfer case
  4. Limited traction or stability in slippery or off-road conditions
  5. Reduced fuel efficiency due to improper transfer case operation

How to Fix P185F 2014 GMC Sierra

  1. Perform a comprehensive diagnostic scan to retrieve the specific trouble codes and pinpoint the underlying issue.
  2. Inspect the wiring harness and connectors for any signs of damage or corrosion, repairing or replacing as necessary.
  3. Test the transfer case motor and encoder motor for proper functionality, replacing any faulty components.
  4. Check and recalibrate the transfer case control module to ensure accurate communication with other vehicle systems.
  5. Clear the DTCs from the vehicle's computer system and perform a test drive to verify that the transfer case shift operation is functioning correctly.

Cost to Fix P185F 2014 GMC Sierra

The typical repair costs for addressing a P185F code in a 2014 GMC Sierra can range from $200 to $600, depending on the specific repairs needed and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. While most auto repair shops charge between $80 and $150 per hour, rates may be higher in metropolitan areas or at dealerships, and lower at independent shops. For a more precise estimate, it is advisable to inquire about local rates before proceeding with the repairs.

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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 P185F 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P185F in a 2014 GMC Sierra?

The common symptoms include difficulty shifting the transfer case, the transfer case getting stuck in a specific gear, and the "Service 4WD" or similar warning message appearing on the dashboard.

2. What could cause the OBDII code P185F error in a 2014 GMC Sierra?

The potential causes of this code include a faulty transfer case control module, damaged wiring or connectors related to the transfer case system, or a malfunctioning transfer case shift motor.

3. How serious is the OBDII code P185F in a 2014 GMC Sierra?

While the vehicle may still be drivable with this code, it is essential to address it promptly to prevent further damage to the transfer case system and ensure proper operation of the 4WD system.

4. Can I continue driving my 2014 GMC Sierra with the OBDII code P185F present?

It is not recommended to drive the vehicle extensively with this code active, as it may lead to issues with the transfer case operation and compromise the vehicle's 4WD functionality.

5. How can I diagnose the OBDII code P185F in my 2014 GMC Sierra?

Diagnosing this code usually involves using a scan tool to retrieve the specific error codes, inspecting the transfer case components for any visible damage, and testing the transfer case shift motor and related wiring for proper functionality.

6. What are some repair tips for resolving the OBDII code P185F in a 2014 GMC Sierra?

Repair tips may include checking and repairing any damaged wiring or connectors, replacing the transfer case control module if necessary, and ensuring proper alignment and operation of the transfer case shift motor.

7. Will resetting the OBDII code P185F in my 2014 GMC Sierra make it go away permanently?

Simply resetting the code may clear the warning temporarily, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is crucial to diagnose and repair the root cause of the problem.

8. Can a DIY enthusiast fix the OBDII code P185F in a 2014 GMC Sierra?

While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing issues related to the transfer case system may require specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

9. How much does it typically cost to repair the OBDII code P185F in a 2014 GMC Sierra?

The cost of repairing this code can vary depending on the specific cause of the issue, the labor rates in your area, and the price of any replacement parts needed. It is advisable to get a diagnostic assessment from a qualified mechanic to determine the exact cost.

10. Is the OBDII code P185F in a 2014 GMC Sierra covered under any warranty?

Depending on the vehicle's warranty status and the specific terms of coverage, the repair for this code may be covered under certain warranties. It is recommended to check your vehicle's warranty documentation or consult with your dealership for more information.

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