What does code U063D mean?

DTC codes / U06xx · Network communication / U063D

U063DLost Communication With Hybrid/EV Electronics Coolant Pump A

U063D is a network communication code indicating that the module responsible for monitoring the hybrid or electric vehicle electronics coolant pump 'A' has lost contact with that pump over the vehicle's communication bus. The computer detects a missing or intermittent response from the pump controller, not necessarily a failed pump motor itself.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaNetwork communication

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.