AutoCodes – Subaru – C0140 Subaru

C0140 Subaru Code - ABS CAN Communication Malfunction

Quick Answer

The Engine Control Module (ECM) monitors the ABS Control Module. Common causes include Faulty ABS Control Module, ABS Control Module harness is open or shorted, ABS Control Module 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: C0140 Subaru indicates ABS CAN Communication Malfunction.
Common causes: Common causes include Faulty ABS Control Module, ABS Control Module harness is open or shorted, ABS Control Module 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 10,982

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 May 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0140 Subaru Description

The Engine Control Module (ECM) monitors the ABS Control Module. The ECM sets the OBDII code when communication with the ABS Control Module fails.

OBDII Code C0140 Subaru - ABS CAN Communication Malfunction - AutoCodes.com — C0140 Subaru Code - ABS CAN Communication Malfunction

What does this mean?

What are the Possible Causes of the DTC C0140 Subaru?

Faulty ABS Control Module
ABS Control Module harness is open or shorted
ABS Control Module circuit poor electrical connection

How to Fix the DTC C0140 Subaru?

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 C0140 Subaru 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 C0140 Subaru Code

1. What are common symptoms of OBDII code C0140 in a Subaru indicating ABS CAN Communication Malfunction?

- Common symptoms include the ABS warning light illuminating on the dashboard, loss of ABS functionality, and potential traction control system issues.

2. What could cause the ABS CAN Communication Malfunction (code C0140) in a Subaru?

- Possible causes include damaged ABS wheel speed sensors, faulty ABS module, wiring issues, or a malfunctioning CAN communication network.

3. How can I diagnose the ABS CAN Communication Malfunction in my Subaru?

- You can diagnose the issue using an OBDII scanner to retrieve the specific trouble code (C0140) and then inspect the ABS sensors, wiring connections, and CAN network for any visible damage or faults.

4. Is it safe to drive my Subaru with OBDII code C0140 indicating ABS CAN Communication Malfunction?

- It is not recommended to drive the vehicle with this code as it can compromise the effectiveness of the ABS system, potentially leading to unsafe driving conditions.

5. Can I reset the OBDII code C0140 related to ABS CAN Communication Malfunction in my Subaru?

- While you can clear the trouble code with an OBDII scanner, it is crucial to address the underlying issue causing the malfunction to prevent the code from reoccurring.

6. How can I repair the ABS CAN Communication Malfunction in my Subaru?

- Repair options may include replacing damaged ABS wheel speed sensors, repairing faulty wiring connections, diagnosing and fixing CAN communication network issues, or replacing the ABS module if necessary.

7. Are there any DIY tips for troubleshooting OBDII code C0140 in a Subaru?

- DIY tips include visually inspecting ABS sensors and wiring for damage, checking for loose connections, and ensuring proper CAN communication network functionality.

8. Can a weak battery or alternator cause OBDII code C0140 in a Subaru related to ABS CAN Communication Malfunction?

- Yes, a weak battery or alternator can potentially cause electrical issues that may trigger the ABS CAN Communication Malfunction code (C0140) in your Subaru.

9. How much does it typically cost to repair OBDII code C0140 for ABS CAN Communication Malfunction in a Subaru?

- Repair costs can vary depending on the exact cause of the issue, but they may range from $200 to $800, including parts and labor.

10. Will ignoring OBDII code C0140 in a Subaru lead to further damage or safety hazards?

- Ignoring the ABS CAN Communication Malfunction code (C0140) can result in compromised ABS functionality, reduced vehicle stability, and potentially unsafe driving conditions, so it is important to address the issue promptly.