U064D
Lost Communication With Trailer Brake Control Switch
U064D is an OBD-II diagnostic trouble code meaning: Lost Communication With Trailer Brake Control Switch. Common causes: open or short circuit in the switch circuit, trailer brake switch malfunction. Estimated repair cost: $17–56.
Symptoms
- Error message on the dashboard
- Trailer brakes do not work
- Brake system warning light
- No response when pressing trailer brake switch
Causes
- Open or short circuit in the switch circuit
- Trailer brake switch malfunction
- Problems with trailer wiring harness
- Malfunction of the trailer brake control unit
- Poor contact in system connectors
How to Fix
- Check the continuity of the trailer brake switch circuit
- Test the operation of the trailer brake switch
- Inspect the wiring harness and connectors for damage.
- Check power and ground in the circuit
- If necessary, replace the switch or repair the wiring
Related codes
Error U064D by Vehicle Brand
FAQ
What does the U064D code mean?
U064D is an OBD-II diagnostic trouble code that indicates: Lost Communication With Trailer Brake Control Switch
What causes a U064D error code?
The most common causes of U064D include: Open or short circuit in the switch circuit; Trailer brake switch malfunction; Problems with trailer wiring harness; Malfunction of the trailer brake control unit.
How do I fix a U064D diagnostic trouble code?
To fix U064D: Check the continuity of the trailer brake switch circuit. Test the operation of the trailer brake switch. Inspect the wiring harness and connectors for damage.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U064D?
Do not drive — repair immediately
How much does it cost to fix U064D?
The estimated repair cost for U064D is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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