P185F 2016 Chevrolet Silverado 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 2016 Chevrolet Silverado 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 2016 Chevrolet Silverado 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 2016 Chevrolet Silverado?
- 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 2016 Chevrolet Silverado?
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 2016 Chevrolet Silverado 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 2016 Chevrolet Silverado code?
Need more information on how to fix the P185F 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P185F 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P185F 2016 Chevrolet Silverado Code
1. What does the OBDII code P185F mean on a 2016 Chevrolet Silverado?
The code P185F indicates "Transfer Case Shift Pending Signal Not Plausible," meaning the transfer case control module has detected an issue with the signal related to the transfer case shift operation.
2. What are the common symptoms of code P185F in a 2016 Chevrolet Silverado?
Common symptoms include difficulty shifting between 4WD modes, the 4WD system being stuck in one mode, warning lights such as the "Service 4WD" message, and possible loss of four-wheel-drive functionality.
3. What causes the P185F code in a Chevrolet Silverado?
Causes may include a faulty transfer case control module, a damaged transfer case shift motor, wiring issues such as corroded or broken connectors, or software-related glitches.
4. Can I drive my 2016 Chevrolet Silverado with the P185F code?
Driving with this code is possible but not recommended, as the 4WD system may not function correctly, which could compromise traction and stability in certain driving conditions.
5. How is the P185F code diagnosed?
A technician will typically use a scan tool to read the code and monitor transfer case data, inspect wiring and connections to the transfer case components, and perform functional tests on the shift motor and control module.
6. What repairs are needed to fix the P185F code?
Repairs could include replacing the transfer case shift motor, repairing or replacing damaged wiring, reprogramming or replacing the transfer case control module, or performing software updates.
7. How much does it cost to fix the P185F code on a 2016 Silverado?
Repair costs can vary widely depending on the root cause, ranging from $100 for simple wiring repairs to $1,000 or more if the transfer case motor or control module needs replacement.
8. Can a low battery or voltage issues cause the P185F code?
Yes, low voltage or battery issues can cause erratic signals in the transfer case system, potentially triggering this code. Always check the battery and charging system before diagnosing further.
9. Is the P185F code related to mechanical problems in the transfer case?
While the code typically points to electrical or signal issues, mechanical problems such as a stuck shift fork or worn components inside the transfer case could also trigger it in rare cases.
10. Can I clear the P185F code without fixing the issue?
Clearing the code without addressing the underlying problem will only provide a temporary fix, as the code will likely return when the issue persists. Proper diagnosis and repair are necessary.
Discuss the causes and fixes for P185F 2016 Chevrolet Silverado OBDII Code
Code P185F 2016 Chevrolet Silverado 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.
