AutoCodes – Generic – B2549

B2549 Code - Driver Door ECU Communication Stop

Quick Answer

Receiving the multiplex signals (driver side window position). Common causes include Faulty Multiplex Network Door ECU Front Left, Multiplex Network Door ECU Left Front harness is open or shorted, Multiplex Network Door ECU Left Front 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: B2549 indicates Driver Door ECU Communication Stop.
Common causes: Common causes include Faulty Multiplex Network Door ECU Front Left, Multiplex Network Door ECU Left Front harness is open or shorted, Multiplex Network Door ECU Left Front 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 1,140

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 Dec 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2549 Description

Receiving the multiplex signals (driver side window position). The sliding roof operation will be stopped if the window does not open further from the specified position.

OBDII Code B2549 - Driver Door ECU Communication Stop - AutoCodes.com — B2549 Code - Driver Door ECU Communication Stop

What does this mean?

What are the Possible Causes of the DTC B2549?

Faulty Multiplex Network Door ECU Front Left
Multiplex Network Door ECU Left Front harness is open or shorted
Multiplex Network Door ECU Left Front circuit poor electrical connection

How to Fix the DTC B2549?

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 B2549 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 B2549 code?

Need more information on how to fix the B2549 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2549 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2549 Chrysler — Tonneau Retract Limit Switch Performance
B2549 Dodge — Tonneau Retract Limit Switch Performance
B2549 Lexus — Driver Door ECU Communication Stop

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 B2549 Code

1. What are common symptoms of OBDII code B2549 (Driver Door ECU Communication Stop)?

Common symptoms include the driver door not locking or unlocking properly, power windows not functioning, and problems with the interior lights.

2. What could cause OBDII code B2549 to trigger?

This code can be triggered by a malfunction in the driver door electronic control unit (ECU), faulty wiring or connectors, or a communication issue between the ECU and other vehicle modules.

3. How can I diagnose the cause of OBDII code B2549?

To diagnose this code, you can perform a visual inspection of the wiring and connectors, check for any loose connections, and use a diagnostic scan tool to communicate with the driver door ECU.

4. Are there any simple repairs I can try for OBDII code B2549?

You can try resetting the ECU by disconnecting the battery for a few minutes, checking and securing any loose wiring or connectors, and ensuring the driver door ECU is properly powered.

5. Is it safe to continue driving with OBDII code B2549?

It is not recommended to continue driving with this code, as it can affect the proper functioning of important systems controlled by the driver door ECU.

6. Can OBDII code B2549 be fixed without professional help?

Simple issues like loose connections or a reset may be done without professional help, but for more complex problems, it is advisable to seek the assistance of a qualified mechanic.

7. How much does it typically cost to repair OBDII code B2549?

The cost of repair can vary depending on the underlying cause of the code. Simple fixes may cost less, while complex issues may require more extensive repairs.

8. Will resetting the OBDII code B2549 make it go away permanently?

Resetting the code may temporarily clear it, but if the underlying issue is not addressed, the code is likely to reappear.

9. Can extreme weather conditions cause OBDII code B2549 to trigger?

Extreme weather conditions can potentially exacerbate existing issues with the driver door ECU communication, leading to the triggering of this code.

10. How important is it to fix OBDII code B2549 promptly?

Promptly addressing this code is important to ensure the proper functioning of the driver door system and related components, as well as maintaining overall vehicle safety and security.