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Engine-Codes – RAM – U112C RAM

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

Quick Answer

The U112C diagnostic trouble code (DTC) indicates that there is a communication issue between the vehicle's onboard computer system and the Transfer Case Switch Bank Module. Common causes include Faulty wiring or connections between the onboard computer system and the Transfer Case Switch Bank Module, Defective Transfer Case Switch Bank Module, Malfunctioning onboard computer system. 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 RAM indicates Lost Communication With Transfer Case Switch Bank Module.
Common causes
Common causes include Faulty wiring or connections between the onboard computer system and the Transfer Case Switch Bank Module, Defective Transfer Case Switch Bank Module, Malfunctioning onboard computer system.
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 Sep 08, 2024
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Code U112C RAM Description

The U112C diagnostic trouble code (DTC) indicates that there is a communication issue between the vehicle's onboard computer system and the Transfer Case Switch Bank Module. The Transfer Case Switch Bank Module is responsible for controlling the transfer case in a four-wheel-drive or all-wheel-drive vehicle. When the communication is lost between these two components, it can lead to a variety of issues with the vehicle's drivetrain and overall performance.

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

Common Causes of U112C RAM

  1. Faulty wiring or connections between the onboard computer system and the Transfer Case Switch Bank Module.
  2. Defective Transfer Case Switch Bank Module.
  3. Malfunctioning onboard computer system.
  4. Corrosion or damage to the electrical connectors.
  5. Water intrusion or moisture affecting the components.

Symptoms of U112C RAM

  1. Inability to switch between two-wheel drive and four-wheel drive modes.
  2. Dashboard warning lights related to the transfer case system.
  3. Loss of traction control or stability control functionality.
  4. Unusual noises coming from the transfer case area.
  5. Rough or jerky shifting between gears.

How to Fix U112C RAM

  1. Perform a thorough diagnostic scan to identify the exact cause of the communication failure.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  3. Test the Transfer Case Switch Bank Module for proper functionality and replace if found to be defective.
  4. Reset the onboard computer system and re-establish communication with the Transfer Case Switch Bank Module.
  5. Conduct a road test to verify that the communication issue has been resolved and that the transfer case system is functioning correctly.

Cost to Fix U112C RAM

The cost of repairs for a U112C code can vary depending on the specific cause of the communication failure and the labor rates in your area. On average, repairing this issue could range from $200 to $500, including parts and labor. It's important to note that diagnostic time and labor rates can vary, so it's advisable to consult with a qualified mechanic for a more accurate estimate based on your vehicle's make and model.

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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 U112C RAM Code

1. What are the common symptoms of OBDII code U112C RAM?

The common symptoms of OBDII code U112C RAM include the service 4WD light coming on, difficulty shifting gears, and loss of communication with the transfer case switch bank module.

2. What are the possible causes of code U112C RAM?

The possible causes of code U112C RAM include a faulty transfer case switch bank module, wiring issues, or a communication error within the vehicle's network.

3. How can I diagnose the U112C RAM code?

To diagnose the U112C RAM code, you can use a diagnostic scan tool to read the code and check for any additional codes present. You can also visually inspect the wiring and connectors related to the transfer case switch bank module.

4. How can I repair the U112C RAM code?

Repairing the U112C RAM code may involve replacing the transfer case switch bank module if it is found to be faulty. Checking and repairing any damaged wiring or connectors can also help resolve the issue.

5. Can a DIY enthusiast fix the U112C RAM code?

While DIY enthusiasts with automotive repair experience may be able to diagnose and repair the U112C RAM code, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair.

6. Is it safe to drive with the U112C RAM code present?

It is not recommended to drive with the U112C RAM code present, as it can lead to potential issues with the vehicle's 4WD system and affect its performance and safety.

7. How much does it cost to repair the U112C RAM code?

The cost to repair the U112C RAM code can vary depending on the underlying cause of the issue, the cost of parts, and labor charges. It is advisable to obtain quotes from different repair shops for an accurate estimate.

8. Can a weak battery cause the U112C RAM code to trigger?

Yes, a weak or failing battery can sometimes cause communication errors within the vehicle's network, leading to codes like U112C RAM. It is recommended to ensure the battery is in good condition when diagnosing this code.

9. Will resetting the code make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the U112C RAM code is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

10. How can I prevent the U112C RAM code from recurring?

To prevent the U112C RAM code from recurring, regular maintenance of the vehicle's 4WD system, keeping the wiring and connectors in good condition, and addressing any issues promptly can help avoid future occurrences of this code.

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