AutoCodes – Generic – U112C

U112C Code - Lost Communication With Transfer Case Switch Bank Module

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) does not receive information from the Transfer Case Switch. Common causes include Faulty Transfer Case Switch, Transfer Case Switch harness is open or shorted, Transfer Case Switch circuit poor electrical connection. 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, Transfer Case Switch harness is open or shorted, Transfer Case Switch circuit poor electrical connection.
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 2,958

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 Apr 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U112C Description

The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) does not receive information from the Transfer Case Switch.

OBDII Code U112C - Lost Communication With Transfer Case Switch Bank Module - AutoCodes.com — U112C Code - Lost Communication With Transfer Case Switch Bank Module

What does this mean?

What are the Possible Causes of the DTC U112C?

Faulty Transfer Case Switch
Transfer Case Switch harness is open or shorted
Transfer Case Switch circuit poor electrical connection

How to Fix the DTC U112C?

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 U112C 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 U112C code?

Need more information on how to fix the U112C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U112C code diagnosed by a professional: Find a repair shop in your area

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.