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Engine-Codes – Generic – U112C

U112C Code - Lost Communication With Transfer Case Switch Bank Module

Quick Answer

The U112C diagnostic trouble code indicates that the vehicle's onboard computer has lost communication with the Transfer Case Switch Bank Module. Common causes include Faulty Transfer Case Switch Bank Module, Wiring or electrical connection issues, Corrosion in the connections or terminals. 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
U112C indicates Lost Communication With Transfer Case Switch Bank Module.
Common causes
Common causes include Faulty Transfer Case Switch Bank Module, Wiring or electrical connection issues, Corrosion in the connections or terminals.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code U112C Description

The U112C diagnostic trouble code indicates that the vehicle's onboard computer has lost communication with the Transfer Case Switch Bank Module. The Transfer Case Switch Bank Module is responsible for controlling the transfer case, which is a part of the drivetrain that allows the driver to switch between two-wheel drive, four-wheel drive, and other driving modes. When communication is lost with this module, it can lead to issues with the transfer case operation, potentially affecting the vehicle's drivability and performance.

OBDII Code U112C - Lost Communication With Transfer Case Switch Bank Module
U112C Code - Lost Communication With Transfer Case Switch Bank Module

Common Causes of U112C

  1. Faulty Transfer Case Switch Bank Module
  2. Wiring or electrical connection issues
  3. Corrosion in the connections or terminals
  4. Software glitches in the vehicle's onboard computer
  5. Physical damage to the module or wiring

Symptoms of U112C

  1. Difficulty shifting between different drive modes
  2. Illumination of the 4WD warning light on the dashboard
  3. Unresponsive transfer case controls
  4. Unexpected changes in drive mode without driver input
  5. Limited functionality of the transfer case system

How to Fix U112C

  1. Begin by conducting a thorough inspection of the wiring and connections to the Transfer Case Switch Bank Module.
  2. Test the module itself to determine if it is functioning correctly or needs to be replaced.
  3. Address any corrosion or damage found in the connections or terminals.
  4. If necessary, reprogram the vehicle's onboard computer to establish communication with the module.
  5. Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.

Cost to Fix U112C

The cost of repairing a U112C code can vary depending on the specific cause of the issue and the labor rates in your area. In general, you can expect to pay anywhere from $200 to $500 for parts and labor to address this problem. Keep in mind that additional diagnostic time may be required to pinpoint the exact issue, and labor rates can differ based on the shop you choose. It's recommended to consult with a qualified mechanic for a more accurate cost estimate.

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Code U112C Information for Specific Makes

  • U112C Chrysler — Lost Communication With Transfer Case Switch Bank Module
  • U112C Dodge — Lost Communication With Transfer Case Switch Bank Module
  • U112C Jeep — Lost Communication With Transfer Case Switch Bank Module
  • U112C RAM — Lost Communication With Transfer Case Switch Bank Module
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 U112C Code

1. What are the common symptoms of OBDII code U112C (Lost Communication With Transfer Case Switch Bank Module)?

- Common symptoms include the illumination of the "Service 4WD System" warning light on the dashboard, issues with engaging or disengaging the 4WD system, and potential loss of communication with the transfer case switch.

2. What are some possible causes of OBDII code U112C?

- Possible causes include a faulty transfer case switch bank module, damaged wiring or connectors in the communication circuit, a software issue, or a problem with the vehicle's control module.

3. How can I diagnose the cause of OBDII code U112C?

- Diagnosing the issue typically involves using a scan tool to retrieve the code and checking for any related codes. You may also need to inspect the wiring and connectors associated with the transfer case switch bank module and perform communication tests.

4. What are the repair options for OBDII code U112C?

- Repair options may include replacing the transfer case switch bank module, repairing any damaged wiring or connectors, updating software if necessary, or reprogramming control modules.

5. Can OBDII code U112C cause any other problems with the vehicle?

- While the code itself indicates a loss of communication with the transfer case switch bank module, it can potentially lead to issues with the 4WD system functionality if left unresolved.

6. Is it safe to continue driving with OBDII code U112C present?

- It is generally not recommended to continue driving with this code present, as it can affect the proper functioning of the 4WD system, especially in adverse driving conditions.

7. How much does it typically cost to repair OBDII code U112C?

- The cost of repairs can vary depending on the specific cause of the issue, but it may involve parts and labor costs ranging from $200 to $500 or more.

8. Can I reset OBDII code U112C on my own?

- While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. How long does it take to repair OBDII code U112C?

- The repair time can vary based on the complexity of the issue and the availability of parts, but it may take a few hours to a full day to diagnose and fix the problem.

10. Are there any preventive measures to avoid OBDII code U112C in the future?

- To prevent the recurrence of U112C, it is advised to regularly inspect and maintain the 4WD system components, including the transfer case switch bank module, wiring, and connectors, as part of routine vehicle maintenance.

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