AutoCodes – Jeep – C140B Jeep

C140B Jeep Code - Transfer Case Motor Performance Circuit Low

Quick Answer

The Final Drive Control Module monitors the Transfer Case Motor. Common causes include Faulty Transfer Case Motor, Transfer Case Motor harness is open or shorted, Transfer Case Motor 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: C140B Jeep indicates Transfer Case Motor Performance Circuit Low.
Common causes: Common causes include Faulty Transfer Case Motor, Transfer Case Motor harness is open or shorted, Transfer Case Motor 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 7,052

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 Sep 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C140B Jeep Description

The Final Drive Control Module monitors the Transfer Case Motor. The Final Drive Control Module sets the OBDII code when the Transfer Case Motor is not to factory specifications.

OBDII Code C140B Jeep - Transfer Case Motor Performance Circuit Low - AutoCodes.com — C140B Jeep Code - Transfer Case Motor Performance Circuit Low

What does this mean?

What are the Possible Causes of the DTC C140B Jeep?

Faulty Transfer Case Motor
Transfer Case Motor harness is open or shorted
Transfer Case Motor circuit poor electrical connection
Faulty Final Drive Control Module

How to Fix the DTC C140B Jeep?

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 C140B Jeep 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 C140B Jeep code?

Need more information on how to fix the C140B Jeep code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C140B Jeep code diagnosed by a professional: Find a repair shop in your area

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 C140B Jeep Code

1. What are the common symptoms of OBDII code C140B in a Jeep related to Transfer Case Motor Performance Circuit Low?

- Common symptoms include difficulty shifting gears, erratic behavior of the transfer case motor, and the vehicle getting stuck in a specific drive mode.

2. What are some possible causes of the C140B code in a Jeep?

- Possible causes include faulty transfer case motor, damaged wiring or connectors in the transfer case motor circuit, low battery voltage, or a malfunctioning transfer case control module.

3. How can I diagnose the C140B code in my Jeep?

- Diagnose the code by checking the transfer case motor for proper operation, inspecting the wiring and connectors for any damage, testing the battery voltage, and scanning the transfer case control module for any related faults.

4. Can I drive my Jeep with the C140B code present?

- It is not recommended to drive your Jeep with the C140B code, as it can lead to unsafe driving conditions and potential damage to the transfer case system.

5. How do I clear the C140B code from my Jeep's OBDII system?

- Clear the code by using an OBDII scan tool to reset the system after addressing the underlying issue causing the code.

6. Is it possible to repair the C140B code in my Jeep at home?

- Depending on the cause of the code, some repairs such as checking and securing wiring connections or replacing the transfer case motor can be done at home if you have the necessary tools and expertise.

7. What should I do if I encounter the C140B code frequently in my Jeep?

- If the code keeps reappearing, it is best to have a professional mechanic perform a thorough diagnosis to identify the root cause and prevent further issues.

8. Can a low battery voltage trigger the C140B code in a Jeep?

- Yes, low battery voltage can disrupt the proper functioning of the transfer case motor and trigger the C140B code. Ensure your battery is in good condition to prevent this issue.

9. How important is it to address the C140B code promptly in a Jeep?

- It is crucial to address the C140B code promptly to avoid potential damage to the transfer case system and ensure safe driving conditions.

10. Are there any preventive maintenance tips to avoid the C140B code in a Jeep?

- Regularly inspecting the transfer case system, keeping the battery in good condition, and addressing any transfer case motor issues promptly can help prevent the occurrence of the C140B code.