AutoCodes – RAM – U112C RAM

U112C RAM 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 RAM 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 3,669

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

What does this mean?

What are the Possible Causes of the DTC U112C RAM?

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 RAM?

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 RAM 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 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.