AutoCodes – Generic – C140D

C140D Code - Transfer Case Motor Control Circuit Open

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: C140D indicates Transfer Case Motor Control Circuit Open.
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 5,733

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 C140D 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 C140D - Transfer Case Motor Control Circuit Open - AutoCodes.com — C140D Code - Transfer Case Motor Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC C140D?

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 C140D?

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 C140D 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 C140D code?

Need more information on how to fix the C140D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C140D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C140D Chrysler — Transfer Case Motor Control Circuit Open
C140D Dodge — Transfer Case Motor Control Circuit Open
C140D Jeep — Transfer Case Motor Control Circuit Open

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 C140D Code

1. What are the common symptoms of OBDII code C140D (Transfer Case Motor Control Circuit Open)?

- Common symptoms include the inability to engage or disengage the four-wheel-drive system, erratic shifting between drive modes, and a warning light on the dashboard.

2. What are the possible causes of OBDII code C140D?

- The code C140D can be caused by a faulty transfer case motor, damaged wiring or connectors in the control circuit, or a malfunctioning transfer case control module.

3. How can I diagnose the cause of OBDII code C140D?

- To diagnose the issue, you can perform a visual inspection of the wiring and connectors, test the transfer case motor for proper operation, and scan the transfer case control module for fault codes.

4. Can I drive my vehicle with OBDII code C140D?

- It is not recommended to drive your vehicle with code C140D active, as it can affect the functionality of the four-wheel-drive system and potentially lead to further damage to the transfer case components.

5. How can I repair OBDII code C140D?

- Repairing code C140D typically involves replacing the faulty transfer case motor, repairing any damaged wiring or connectors in the control circuit, and resetting the transfer case control module.

6. Is it necessary to clear the OBDII code C140D after the repair?

- Yes, it is important to clear the code C140D after completing the repair to reset the system and ensure that the issue has been resolved.

7. Can a DIY enthusiast fix OBDII code C140D at home?

- While some basic troubleshooting steps can be performed at home, diagnosing and repairing code C140D may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

8. How much does it cost to fix OBDII code C140D at a repair shop?

- The cost of repairing code C140D can vary depending on the extent of the damage and the specific components that need to be replaced, but it typically ranges from $200 to $600 at a repair shop.

9. Are there any preventive measures to avoid OBDII code C140D in the future?

- Regularly inspecting and maintaining the transfer case components, as well as addressing any issues promptly, can help prevent the occurrence of code C140D in the future.

10. What should I do if OBDII code C140D keeps coming back after repair?

- If code C140D keeps reappearing after repair, it is recommended to recheck the components that were replaced or repaired, as well as perform a thorough diagnostic to identify any underlying issues that may be causing the recurrence.