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P185F Cadillac 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 Cadillac 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.

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Code Popularity 810

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P185F Cadillac Description

The Engine Control Module (ECM) uses the following two ways to determine if the transfer case is in 4WD Low, 4WD High, or Neutral.
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.

OBDII Code P185F Cadillac - Transfer Case Shift Pending Signal Not Plausible - AutoCodes.com — P185F Cadillac Code - Transfer Case Shift Pending Signal Not Plausible

What does this mean?

What are the Possible Causes of the DTC P185F Cadillac?

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 Cadillac?

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 Cadillac 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.

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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 Cadillac Code

1. What are the common symptoms of OBDII code P185F in a Cadillac related to the Transfer Case Shift Pending Signal Not Plausible issue?

- Common symptoms include difficulty shifting gears, illuminated warning lights on the dashboard, and the vehicle getting stuck in a particular gear.

2. What are the possible causes of OBDII code P185F in a Cadillac indicating Transfer Case Shift Pending Signal Not Plausible?

- Potential causes can include faulty transfer case shift control module, damaged wiring harness, or issues with the transfer case actuator.

3. How can I diagnose the OBDII code P185F in a Cadillac related to the Transfer Case Shift Pending Signal Not Plausible problem?

- Diagnosis involves using a diagnostic scanner to retrieve the trouble codes, testing the transfer case shift control module, inspecting the wiring for any damage, and checking the transfer case actuator.

4. What are some DIY repair tips for fixing the OBDII code P185F in a Cadillac with the Transfer Case Shift Pending Signal Not Plausible fault?

- DIY repair tips may include checking and repairing any damaged wiring connections, resetting the transfer case control module, or replacing the transfer case actuator if necessary.

5. Can driving with the OBDII code P185F in a Cadillac indicating Transfer Case Shift Pending Signal Not Plausible cause further damage?

- Continuing to drive with this issue can potentially cause damage to the transfer case components and affect the vehicle's drivability, so it's recommended to address the problem promptly.

6. Is it safe to drive my Cadillac with the OBDII code P185F related to Transfer Case Shift Pending Signal Not Plausible activated?

- It is not advisable to drive the vehicle with this code activated, as it can lead to unpredictable shifting behavior and potentially compromise safety on the road.

7. How much does it typically cost to repair the OBDII code P185F in a Cadillac with the Transfer Case Shift Pending Signal Not Plausible issue?

- The repair cost can vary depending on the exact cause of the problem, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. Are there any recalls or technical service bulletins related to the OBDII code P185F in Cadillac vehicles with the Transfer Case Shift Pending Signal Not Plausible issue?

- It's recommended to check with a Cadillac dealership or online resources for any recalls or technical service bulletins specific to this code and problem in your vehicle.

9. Can a simple reset of the system resolve the OBDII code P185F in a Cadillac associated with the Transfer Case Shift Pending Signal Not Plausible issue?

- In some cases, a system reset may temporarily clear the code, but if the underlying issue persists, the code is likely to return, indicating a need for further diagnosis and repair.

10. Is it possible to prevent the OBDII code P185F related to Transfer Case Shift Pending Signal Not Plausible in a Cadillac from recurring in the future?

- Regular maintenance, timely repairs of related components, and addressing any warning signs promptly can help prevent the reoccurrence of this code in the future.