AutoCodes – Generic – U1041

U1041 Code - Lost Communications With Electronic Brake Control Module

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake 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: U1041 indicates Lost Communications With Electronic Brake Control Module.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake 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 75,092

How popular is this code, among other codes? Medium

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 U1041 Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1041 is set.

OBDII Code U1041 - Lost Communications With Electronic Brake Control Module - AutoCodes.com — U1041 Code - Lost Communications With Electronic Brake Control Module

What does this mean?

What are the Possible Causes of the DTC U1041?

Faulty Electronic Brake Control Module (EBCM)
Electronic Brake Control Module harness is open or shorted
Electronic Brake Control Module circuit poor electrical connection

How to Fix the DTC U1041?

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 U1041 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 U1041 code?

Need more information on how to fix the U1041 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1041 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U1041 Buick — Lost Communications With Electronic Brake Control Module
U1041 Cadillac — Lost Communications With Electronic Brake Control Module
U1041 Chevrolet — Lost Communications With Electronic Brake Control Module
U1041 Ford — Missing Or Invalid Speed Message
U1041 GMC — Invalid Or Missing Data For Electronic Brake Control Module
U1041 Lincoln — Missing Or Invalid Speed Message
U1041 Mercury — Missing Or Invalid Speed Message

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 U1041 Code

1. What are the common symptoms of OBDII code U1041 (Lost Communications With Electronic Brake Control Module)?

The common symptoms include the ABS warning light illuminating on the dashboard, loss of traction control functionality, and potential issues with the vehicle's braking system.

2. What are the possible causes of OBDII code U1041?

The code U1041 typically indicates a communication problem between the engine control module (ECM) and the electronic brake control module (EBCM). This can be caused by a faulty wiring connection, a damaged EBCM, or a malfunctioning ECM.

3. How can I diagnose the cause of OBDII code U1041?

Diagnosing the cause of U1041 involves checking the wiring connections between the ECM and EBCM, testing the communication signal using a diagnostic scan tool, and inspecting the modules for any signs of damage or corrosion.

4. Can OBDII code U1041 be repaired without professional help?

While some DIY enthusiasts may attempt to troubleshoot and repair U1041, it is recommended to seek professional help due to the complexity of diagnosing and fixing communication issues between modules.

5. Is it safe to drive with OBDII code U1041 present?

Driving with U1041 may compromise the vehicle's ABS and traction control systems, potentially affecting the vehicle's braking performance and safety. It is advisable to address the issue promptly to ensure safe driving conditions.

6. How much does it typically cost to repair OBDII code U1041?

The cost of repairing U1041 can vary depending on the exact cause of the communication issue. It may involve replacing wiring harnesses, repairing or replacing the EBCM or ECM, and labor costs, which can range from a few hundred to over a thousand dollars.

7. Can a low battery voltage trigger OBDII code U1041?

Yes, a low battery voltage can disrupt communication between modules and trigger U1041. It is recommended to ensure the vehicle's battery is in good condition and properly charged to prevent such issues.

8. Will resetting the OBDII code U1041 make it go away permanently?

Simply clearing the code without addressing the underlying cause will not permanently resolve U1041. It is crucial to diagnose and fix the communication problem to prevent the code from reoccurring.

9. Are there any recalls related to OBDII code U1041 for specific vehicle models?

Recalls related to U1041 may vary depending on the vehicle make and model. It is advisable to check with the manufacturer or visit the National Highway Traffic Safety Administration (NHTSA) website for any recall information.

10. What steps can I take to prevent OBDII code U1041 from occurring in the future?

Regular maintenance, including checking and cleaning wiring connections, ensuring proper battery voltage, and promptly addressing any warning lights related to the ABS or traction control system, can help prevent issues leading to U1041.