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P185F 2017 GMC Sierra Code - Transfer Case Shift Pending Signal Not Plausible

Quick Answer

The P185F diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the transfer case shift pending signal is not plausible. Common causes include Faulty transfer case shift motor, Wiring or connector issues in the transfer case shift system, Low transfer case fluid level. 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 2017 GMC Sierra indicates Transfer Case Shift Pending Signal Not Plausible.
Common causes
Common causes include Faulty transfer case shift motor, Wiring or connector issues in the transfer case shift system, Low transfer case fluid level.
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 18, 2024
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Code P185F 2017 GMC Sierra Description

The P185F diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the transfer case shift pending signal is not plausible. This means that there is a discrepancy between the signal being sent to the transfer case and the expected response from the system. The transfer case is responsible for distributing power between the front and rear axles of the vehicle, allowing for four-wheel drive operation. When this signal is not plausible, it can lead to issues with the vehicle's drivability and overall performance.

OBDII Code P185F 2017 GMC Sierra - Transfer Case Shift Pending Signal Not Plausible
P185F 2017 GMC Sierra Code - Transfer Case Shift Pending Signal Not Plausible

Common Causes of P185F 2017 GMC Sierra

  1. Faulty transfer case shift motor
  2. Wiring or connector issues in the transfer case shift system
  3. Low transfer case fluid level
  4. Malfunctioning transfer case control module
  5. Mechanical issues within the transfer case itself

Symptoms of P185F 2017 GMC Sierra

  1. Difficulty shifting between drive modes
  2. Stuck in a particular drive mode
  3. Illumination of the service 4WD light on the dashboard
  4. Unusual noises coming from the transfer case area
  5. Reduced traction and stability while driving

How to Fix P185F 2017 GMC Sierra

  1. Begin by conducting a thorough diagnostic scan to confirm the P185F code and identify any additional related codes.
  2. Inspect the transfer case shift motor, wiring, and connectors for any signs of damage or corrosion. Repair or replace components as needed.
  3. Check the transfer case fluid level and quality. Top up or replace the fluid if necessary.
  4. Test the transfer case control module for proper operation and replace if faulty.
  5. Clear the DTCs from the vehicle's computer system and perform a test drive to ensure the issue has been resolved.

Cost to Fix P185F 2017 GMC Sierra

The cost of repairing a P185F code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the parts and labor for this repair can range from $200 to $600. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple sources to get a more accurate estimate for your specific situation.

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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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P185F on a 2017 GMC Sierra related to the Transfer Case Shift Pending Signal Not Plausible issue?

- Common symptoms include difficulty shifting gears, erratic behavior in the transfer case, and warning lights on the dashboard.

2. What are some possible causes of OBDII code P185F on a 2017 GMC Sierra?

- Possible causes include a faulty transfer case control module, wiring issues, sensor malfunctions, or problems with the transfer case actuator.

3. How serious is the Transfer Case Shift Pending Signal Not Plausible issue indicated by OBDII code P185F on a 2017 GMC Sierra?

- This issue can affect the proper functioning of the transfer case, leading to potential safety concerns and drivability issues. It is advisable to address the problem promptly.

4. Can OBDII code P185F on a 2017 GMC Sierra be cleared/reset, or does it require immediate repair?

- While the code can be cleared/reset, it is important to investigate the underlying cause and address any issues to prevent the problem from recurring.

5. What are some DIY repair tips for dealing with OBDII code P185F on a 2017 GMC Sierra?

- DIY repair tips include checking and cleaning the connections to the transfer case components, inspecting the wiring harness for damage, and ensuring proper grounding.

6. Is it safe to continue driving a 2017 GMC Sierra with OBDII code P185F indicating the Transfer Case Shift Pending Signal Not Plausible?

- It is not recommended to drive the vehicle with this issue as it can lead to further damage to the transfer case components and compromise safety.

7. How can a mechanic diagnose OBDII code P185F on a 2017 GMC Sierra?

- A mechanic can use a scan tool to read the code, conduct a visual inspection of the transfer case components, perform electrical tests, and check for any related trouble codes.

8. What are the typical repair costs associated with addressing OBDII code P185F on a 2017 GMC Sierra?

- Repair costs can vary depending on the specific cause of the issue, but they may involve replacing components such as the transfer case control module or addressing wiring problems.

9. Will OBDII code P185F on a 2017 GMC Sierra cause the vehicle to go into a limp mode?

- Depending on the severity of the issue, the vehicle may go into a limp mode to protect the drivetrain. It is essential to address the problem to regain full functionality.

10. How can I prevent OBDII code P185F from appearing on my 2017 GMC Sierra in the future?

- Regular maintenance, such as checking for loose connections, keeping the wiring harness in good condition, and addressing any transfer case issues promptly, can help prevent the recurrence of this code.

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