P185F 2017 GMC Sierra Code - Transfer Case Shift Pending Signal Not Plausible
Quick Answer
The Engine Control Module (ECM) uses the following two ways to determine if the transfer case is in 4WD Low, 4WD High, or Neutral. Common causes include Reprogram Engine Control Module (ECM), Faulty Engine Control Module, Engine Control Module harness is open or shorted. 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 Reprogram Engine Control Module (ECM), Faulty Engine Control Module, Engine Control Module harness is open or shorted.
- 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.
Code P185F 2017 GMC Sierra Description
1. The first way is to compare the transmission output speed sensor to the transfer case output speed sensor in order to calculate the transfer case range.
2. The second way is to use a LAN message sent by the transfer case shift control module to the ECM.
The ECM uses this message to determine motor torque required and transmission shifting.
The internal fault detection is handled inside the control module. No external circuit diagnosis is involved.
If the first way and second way of determining transfer case range do not match while in 4WD Low, 4WD High or Neutral, then the Diagnostic Trouble Code (DTC) is set.
What are the Possible Causes of the DTC P185F 2017 GMC Sierra?
- Reprogram Engine Control Module (ECM)
- Faulty Engine Control Module
- Engine Control Module harness is open or shorted
- Engine Control Module circuit poor electrical connection
- Transmission internal mechanical problems
How to Fix the DTC P185F 2017 GMC Sierra?
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 P185F 2017 GMC Sierra 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.
Need more information about the P185F 2017 GMC Sierra code?
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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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