P185F 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 Chevrolet Silverado code?
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Frequently Asked Questions about P185F 2018 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P185F in a 2018 Chevrolet Silverado?
Common symptoms include difficulty shifting gears, erratic shifting behavior, and a warning light on the dashboard indicating an issue with the transfer case.
2. What does the OBDII code P185F "Transfer Case Shift Pending Signal Not Plausible" mean for a 2018 Chevrolet Silverado?
This code indicates that there is a discrepancy between the signals received by the transfer case control module regarding the shift position of the transfer case.
3. What are the possible causes of OBDII code P185F in a 2018 Chevrolet Silverado?
Potential causes include a faulty transfer case control module, damaged wiring or connectors, a malfunctioning transfer case motor, or issues with the transfer case shift position sensor.
4. How can I diagnose OBDII code P185F in my 2018 Chevrolet Silverado?
Diagnosis typically involves using a scan tool to retrieve the code, checking for any related codes or issues, inspecting the transfer case components, and testing the transfer case shift position sensor.
5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P185F?
It is not recommended to continue driving with this code present, as it can lead to further damage to the transfer case components and potentially affect the drivability of your vehicle.
6. How can OBDII code P185F in a 2018 Chevrolet Silverado be repaired?
Repair options may include replacing the transfer case control module, repairing damaged wiring or connectors, replacing the transfer case motor, or addressing any issues with the transfer case shift position sensor.
7. Is it possible to reset OBDII code P185F in a 2018 Chevrolet Silverado without fixing the underlying issue?
While you can clear the code using a scan tool, the underlying issue causing the code will likely persist until properly diagnosed and repaired.
8. How much does it typically cost to repair OBDII code P185F in a 2018 Chevrolet Silverado?
The cost of repairs can vary depending on the specific cause of the code, the parts needed, and labor costs. It is recommended to consult a mechanic for an accurate estimate.
9. Can a DIY enthusiast fix OBDII code P185F in a 2018 Chevrolet Silverado?
Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address certain causes of this code, such as checking and repairing wiring or connectors. However, more complex issues may require professional expertise.
10. Are there any preventative maintenance tips to avoid OBDII code P185F in a 2018 Chevrolet Silverado?
Regularly inspecting and maintaining the transfer case components, ensuring proper fluid levels, and addressing any unusual shifting behavior promptly can help prevent issues that lead to this code.
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