P185F 2016 GMC Sierra Code - Transfer Case Shift Pending Signal Not Plausible
Quick Answer
The P185F diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the transfer case shift pending signal is not plausible. Common causes include Faulty transfer case shift motor, Wiring issues or loose connections in the transfer case system, Malfunctioning transfer case shift position sensor. 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 2016 GMC Sierra indicates Transfer Case Shift Pending Signal Not Plausible.
- Common causes
- Common causes include Faulty transfer case shift motor, Wiring issues or loose connections in the transfer case system, Malfunctioning transfer case shift position sensor.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P185F 2016 GMC Sierra Description
The P185F diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the transfer case shift pending signal is not plausible. In simpler terms, this means that the signal being sent to the transfer case control module (TCCM) is not matching the expected signal for the current shift position. This can lead to issues with the vehicle's four-wheel-drive system, potentially causing drivability problems and safety concerns.
Common Causes of P185F 2016 GMC Sierra
- Faulty transfer case shift motor
- Wiring issues or loose connections in the transfer case system
- Malfunctioning transfer case shift position sensor
- Problems with the TCCM software or hardware
- Mechanical issues within the transfer case itself
Symptoms of P185F 2016 GMC Sierra
- Difficulty engaging or disengaging four-wheel drive
- Illumination of the four-wheel-drive warning light on the dashboard
- Unusual noises coming from the transfer case
- Vehicle feeling like it is stuck in a particular drive mode
How to Fix P185F 2016 GMC Sierra
- Perform a diagnostic scan to retrieve the specific trouble codes and pinpoint the exact cause of the issue.
- Inspect the transfer case shift motor, wiring, and sensors for any signs of damage or malfunction.
- Test the TCCM for proper operation and address any software or hardware issues.
- Replace any faulty components, such as the transfer case shift motor or sensors, as needed.
- Clear the trouble codes, reset the system, and test the vehicle to ensure proper operation of the four-wheel-drive system.
Cost to Fix P185F 2016 GMC Sierra
The cost of repairing a P185F code on a 2016 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the repair costs for this type of problem can range from $200 to $800, including parts and labor. 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 an accurate estimate for your specific situation.
Need more information about the P185F 2016 GMC Sierra code?
Need more information on how to fix the P185F 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P185F 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P185F 2016 GMC Sierra Code
1. What does the OBDII code P185F mean for a 2016 GMC Sierra?
The P185F code indicates an issue where the transfer case shift pending signal is detected as not plausible, suggesting a communication or mechanical fault in the transfer case system.
2. What are the common symptoms of the P185F code in a 2016 GMC Sierra?
Symptoms can include the "Service 4WD" light illuminating, failure to shift between 2WD and 4WD modes, and unusual noises or delays when engaging the transfer case.
3. What causes the P185F code to trigger in a GMC Sierra?
The code can be caused by a faulty transfer case shift motor, wiring or connector issues, a malfunctioning transfer case control module (TCCM), or software-related errors.
4. Can the P185F code affect drivability in the GMC Sierra?
Yes, it may affect drivability in 4WD modes, potentially preventing proper engagement or disengagement of the transfer case and limiting off-road or adverse condition performance.
5. How is the P185F code diagnosed?
A technician will use a scan tool to verify the code, inspect wiring and connectors for damage, test the transfer case shift motor, and check for software updates or TCCM faults.
6. Can I still drive my 2016 GMC Sierra with the P185F code?
You can likely drive in 2WD mode, but using 4WD may be unreliable or unavailable. It’s best to address the issue promptly to avoid further damage.
7. How can I fix the P185F code on my GMC Sierra?
Repairs may include replacing the transfer case shift motor, repairing damaged wiring, updating TCCM software, or replacing the TCCM if it’s faulty.
8. How much does it cost to repair the P185F code on a 2016 GMC Sierra?
Repair costs vary, but replacing the transfer case shift motor may cost $300–$700, while TCCM replacement or wiring repairs can add to the expense.
9. Can a software update fix the P185F code on my GMC Sierra?
In some cases, a software update for the TCCM may resolve the issue if it’s related to incorrect signal processing or outdated programming.
10. What preventative maintenance can help avoid the P185F code?
Regularly inspect and clean transfer case system wiring and connectors, ensure proper lubrication in the transfer case, and keep TCCM software up to date.
Discuss the causes and fixes for P185F 2016 GMC Sierra OBDII Code
Code P185F 2016 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.