OBD Guide
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U2504

Invalid Data Received From Trailer Brake Driver Control Module

U2504 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Trailer Brake Driver Control Module. Common causes: trailer brake control module malfunction, damage to the wiring to the module. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)

Symptoms

  • The malfunction indicator on the instrument panel is on
  • No response from trailer brakes
  • Reduced trailer braking performance
  • Error in towing system
  • Inability to activate trailer brakes

Causes

  • Trailer brake control module malfunction
  • Damage to the wiring to the module
  • Poor contact in connectors
  • Software error in the module
  • Module power problems

How to Fix

  1. Check connections and wiring to the module
  2. Test the power supply and ground of the module
  3. Scan the module for additional errors
  4. Update module software
  5. If necessary, replace the control module

Related codes

U2500U2501U2503

FAQ

What does the U2504 code mean?

U2504 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Trailer Brake Driver Control Module

What causes a U2504 error code?

The most common causes of U2504 include: Trailer brake control module malfunction; Damage to the wiring to the module; Poor contact in connectors; Software error in the module.

How do I fix a U2504 diagnostic trouble code?

To fix U2504: Check connections and wiring to the module. Test the power supply and ground of the module. Scan the module for additional errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U2504?

Do not drive — repair immediately

How much does it cost to fix U2504?

The estimated repair cost for U2504 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat