AutoCodes – Generic – U2504

U2504 Code - Invalid Data Received From Trailer Brake Driver Control Module

Quick Answer

Some devices are constantly receiving information from other devices through serial data communication network. Common causes include Reprogram Trailer Brake Driver Control Module, Faulty Trailer Brake Driver Control Module, Trailer Brake Driver Control Module harness is open or shorted. 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: U2504 indicates Invalid Data Received From Trailer Brake Driver Control Module.
Common causes: Common causes include Reprogram Trailer Brake Driver Control Module, Faulty Trailer Brake Driver Control Module, Trailer Brake Driver Control Module harness is open or shorted.
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 3,047

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 Jun 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2504 Description

Some devices are constantly receiving information from other devices through serial data communication network. The invalid data code will be set when a receiving device detects a discrepancy in the information it receives from another device causing its integrity to be questioned. The symptom byte listed in the Diagnostic Trouble Code (DTC) Descriptor is for engineering reference only. No external circuit diagnosis is involved. The DTC will set if the Trailer Brake Driver Control Module is not configured properly.

OBDII Code U2504 - Invalid Data Received From Trailer Brake Driver Control Module - AutoCodes.com — U2504 Code - Invalid Data Received From Trailer Brake Driver Control Module

What does this mean?

What are the Possible Causes of the DTC U2504?

Reprogram Trailer Brake Driver Control Module
Faulty Trailer Brake Driver Control Module
Trailer Brake Driver Control Module harness is open or shorted
Trailer Brake Driver Control Module circuit poor electrical connection

How to Fix the DTC U2504?

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 U2504 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 U2504 code?

Need more information on how to fix the U2504 code? Get Access to Factory Service Manuals

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Information for Specific Makes

U2504 Buick — Invalid Data Received From Trailer Brake Driver Control Module
U2504 Cadillac — Invalid Data Received From Trailer Brake Driver Control Module
U2504 Chevrolet — Invalid Data Received From Trailer Brake Driver Control Module
U2504 GMC — Invalid Data Received From Trailer Brake Driver Control Module

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 U2504 Code

1. What are common symptoms of OBDII code U2504?

The common symptoms of OBDII code U2504 include issues with the trailer brake system, such as erratic trailer brake operation or complete trailer brake failure.

2. What does OBDII code U2504 mean?

OBDII code U2504 means that the vehicle's onboard diagnostic system has detected invalid data being received from the trailer brake driver control module.

3. What are possible causes of OBDII code U2504?

Possible causes of OBDII code U2504 include a faulty trailer brake driver control module, damaged wiring or connectors between the module and the vehicle, or software communication issues.

4. How can I diagnose OBDII code U2504?

Diagnosing OBDII code U2504 involves using a diagnostic scanner to retrieve the code, checking the trailer brake system for any visible damage, and testing the wiring and connectors for continuity and proper connections.

5. How can I repair OBDII code U2504?

To repair OBDII code U2504, you may need to replace the trailer brake driver control module, repair any damaged wiring or connectors, or update the software to resolve communication issues.

6. Can OBDII code U2504 be safely ignored?

It is not recommended to ignore OBDII code U2504, as it indicates a problem with the trailer brake system that could affect the safety and functionality of the vehicle while towing a trailer.

7. Can OBDII code U2504 cause other issues in the vehicle?

While OBDII code U2504 specifically relates to the trailer brake system, unresolved issues with the trailer brake driver control module can potentially cause electrical problems or affect other vehicle systems.

8. Is it safe to drive with OBDII code U2504 present?

It is not advisable to drive with OBDII code U2504 present, especially if you are planning to tow a trailer. The code indicates a potential fault in the trailer brake system that could compromise safety.

9. How much does it typically cost to repair OBDII code U2504?

The cost to repair OBDII code U2504 can vary depending on the exact cause of the issue. Replacing the trailer brake driver control module or repairing wiring may range from a few hundred to a few thousand dollars.

10. Can I reset OBDII code U2504 without fixing the underlying issue?

While you can clear the code temporarily, it will likely reappear if the underlying issue is not addressed. It is important to diagnose and repair the cause of OBDII code U2504 to ensure the proper functioning of the trailer brake system.