AutoCodes – Generic – C140B

C140B 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 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 4,520

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

What does this mean?

What are the Possible Causes of the DTC C140B?

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?

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 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 code?

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

Need Help with the Code?

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

Information for Specific Makes

C140B Chrysler — Transfer Case Motor Performance Circuit Low
C140B Dodge — Transfer Case Motor Performance Circuit Low
C140B Jeep — Transfer Case Motor Performance Circuit Low

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 Code

1. What are the common symptoms of OBDII code C140B (Transfer Case Motor Performance Circuit Low)?

- Common symptoms include difficulty shifting gears, the transfer case not engaging properly, and the illumination of the 4WD warning light on the dashboard.

2. What are some possible causes of OBDII code C140B?

- Possible causes include a faulty transfer case motor, damaged wiring or connectors in the motor circuit, or issues with the transfer case control module.

3. How can I diagnose the cause of OBDII code C140B?

- Diagnosing the issue typically involves checking the transfer case motor for proper operation, inspecting the wiring and connectors for damage, and using a diagnostic scan tool to retrieve specific error codes.

4. Can I still drive my vehicle with OBDII code C140B present?

- It is not recommended to continue driving your vehicle with this code present, as it can lead to further damage to the transfer case components and affect the drivability of the vehicle.

5. How can I repair OBDII code C140B?

- Repair options may include replacing the transfer case motor, repairing damaged wiring or connectors, or reprogramming the transfer case control module to resolve the performance circuit low issue.

6. Is it safe to reset the OBDII code C140B without fixing the underlying issue?

- Resetting the code without addressing the root cause may temporarily turn off the warning light, but the issue will likely reappear, potentially causing more severe problems in the future.

7. Are there any DIY repair tips for OBDII code C140B?

- DIY enthusiasts with automotive repair experience may attempt to inspect the transfer case motor, wiring, and connectors for visible damage before seeking professional help for a more accurate diagnosis and repair.

8. How much does it usually cost to fix OBDII code C140B at a repair shop?

- The cost of fixing this code can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can extreme weather conditions contribute to triggering OBDII code C140B?

- Yes, extreme cold or hot weather conditions can sometimes exacerbate electrical issues in the transfer case motor circuit, potentially leading to the activation of code C140B.

10. How frequently does OBDII code C140B occur in vehicles with transfer case motor problems?

- OBDII code C140B related to transfer case motor performance circuit low is a relatively common issue in vehicles equipped with 4WD systems, especially in older models or those subjected to harsh driving conditions.