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U064D: Lost Communication With Trailer Brake Control Switch

Severity
Medium
System
Vehicle Systems

What Does U064D Mean?

U064D is a diagnostic trouble code indicating: Lost Communication With Trailer Brake Control Switch. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of U064D

Common Causes

Frequently Asked Questions

What does U064D mean?
U064D indicates: Lost Communication With Trailer Brake Control Switch. The vehicle's computer has detected that the Trailer Brake Control Switch is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code U064D?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with U064D for extended periods may cause additional problems.
How much does it cost to fix U064D?
Repair costs for U064D typically range from $80 to $800, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Inspect CAN bus wiring to Trailer Brake Control Switch for damage
  • 🔧 Check power and ground supply to Trailer Brake Control Switch
  • 🔧 Replace failed Trailer Brake Control Switch
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

U0600 Lost Communication With Engine Oil Pressure Sensor A U0601 Lost Communication With Particulate Filter Pressure Sensor A U0602 Lost Communication With Particulate Filter Pressure Sensor B U0603 Lost Communication With Fuel Pressure Sensor A U0604 Lost Communication With Fuel Pressure Sensor B U0605 Lost communication With A/C Refrigerant Sensor A U0606 Lost Communication With Throttle/Pedal Position Sensor/Switch A U0607 Lost Communication With Throttle/Pedal Position Sensor/Switch B U0608 Lost Communication With Throttle/Pedal Position Sensor/Switch C U0609 Lost Communication With Manifold Absolute Pressure/Barometric Pressure Sensor