Engine-CodesChevrolet – P185F 2017 Chevrolet Silverado

P185F 2017 Chevrolet Silverado Code - Transfer Case Shift Pending Signal Not Plausible

Quick Answer

The P185F diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates that there is an issue with the Transfer Case Shift Pending Signal Not Plausible. Common causes include Faulty transfer case shift motor, Damaged wiring or connectors in the transfer case system, Malfunctioning transfer case control module. 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 Chevrolet Silverado indicates Transfer Case Shift Pending Signal Not Plausible.
Common causes
Common causes include Faulty transfer case shift motor, Damaged wiring or connectors in the transfer case system, Malfunctioning transfer case control module.
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.
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P185F 2017 Chevrolet Silverado Description

The P185F diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates that there is an issue with the Transfer Case Shift Pending Signal Not Plausible. This means that the signal being sent to the transfer case to shift between two-wheel drive, four-wheel drive, or all-wheel drive is not being received or interpreted correctly by the vehicle's computer system. This can lead to improper shifting of the transfer case, potentially causing drivability issues and affecting the vehicle's performance.

OBDII Code P185F 2017 Chevrolet Silverado - Transfer Case Shift Pending Signal Not Plausible
P185F 2017 Chevrolet Silverado Code - Transfer Case Shift Pending Signal Not Plausible

Common Causes of P185F 2017 Chevrolet Silverado

  1. Faulty transfer case shift motor
  2. Damaged wiring or connectors in the transfer case system
  3. Malfunctioning transfer case control module
  4. Software glitch in the vehicle's computer system
  5. Low transfer case fluid level or contaminated fluid

Symptoms of P185F 2017 Chevrolet Silverado

  1. Difficulty shifting between drive modes
  2. Vehicle getting stuck in two-wheel drive
  3. Unusual noises coming from the transfer case area
  4. Dashboard warning lights related to the transfer case system

How to Fix P185F 2017 Chevrolet Silverado

  1. Diagnose the specific cause of the issue by using a scan tool to retrieve the DTC and inspecting the transfer case components.
  2. Replace the faulty transfer case shift motor or repair any damaged wiring or connectors in the system.
  3. Test the transfer case control module for proper function and reprogram if necessary.
  4. Check and refill the transfer case fluid to the correct level and quality.
  5. Clear the DTC from the vehicle's computer system and test drive the vehicle to ensure proper operation of the transfer case.

Cost to Fix P185F 2017 Chevrolet Silverado

The typical repair costs for addressing a P185F code on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of parts such as a transfer case shift motor or wiring connectors can range from $200 to $500, while labor costs can add another $100 to $300 to the total bill. Overall, the total repair cost for this issue could range from $300 to $800, but it's important to note that prices may vary based on location, vehicle make and model, and the specific repair shop. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate.

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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 Chevrolet Silverado Code

1. What does the OBDII code P185F mean on a 2017 Chevrolet Silverado?

The P185F code indicates a "Transfer Case Shift Pending Signal Not Plausible," meaning the transfer case control module has detected an issue with the shift signal.

2. What are common symptoms of the P185F code in a Chevrolet Silverado?

Symptoms may include the 4WD system not engaging properly, dashboard warning lights (like the Service 4WD light), or the inability to switch between 4WD and 2WD modes.

3. What causes the P185F code to appear in a 2017 Chevrolet Silverado?

Common causes include faulty transfer case shift motor, wiring or connection issues, a malfunctioning transfer case control module, or software glitches.

4. How can I diagnose the P185F code in my Chevrolet Silverado?

Start by using a diagnostic scanner to confirm the code, then inspect the transfer case wiring, connectors, and shift motor. Check for any physical damage or corrosion.

5. Is the P185F code serious for my Silverado?

While it may not immediately affect drivability, unresolved issues with the transfer case can lead to further damage or leave the vehicle stuck in an undesirable drive mode.

6. Can I fix the P185F code myself?

If you're experienced with vehicle repairs, you can inspect and replace faulty wiring or connectors. However, more complex repairs like replacing the shift motor or control module may require professional assistance.

7. How much does it cost to repair the P185F code on a Chevrolet Silverado?

Repair costs vary but may range from $200 to $700 depending on whether the issue is with the shift motor, wiring, or transfer case control module.

8. Can a software update fix the P185F code?

In some cases, a software update for the transfer case control module may resolve the issue. Check with your dealer or mechanic to see if an update is available.

9. Will clearing the P185F code fix the problem?

Clearing the code may temporarily remove the warning, but if the underlying issue is not addressed, it will likely return.

10. What preventive measures can I take to avoid the P185F code?

Regularly inspect and maintain the transfer case system, including the wiring and connectors, and ensure the software is up to date. Avoid excessive strain on the 4WD system to reduce wear.

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