What does code U067D mean?

Q: What does code U067D mean?

Lost Communication With Fan 4. U067D is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the fan control module designated as Fan 4. The computer sets this code when it expects periodic status messages from Fan 4 but does not receive them within the programmed timeout window, which usually points to a wiring fault, a power or ground problem at the fan module, or a failed fan module itself.

DTC codes / U06xx · Network communication / U067D

U067DLost Communication With Fan 4

U067D is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the fan control module designated as Fan 4. The computer sets this code when it expects periodic status messages from Fan 4 but does not receive them within the programmed timeout window, which usually points to a wiring fault, a power or ground problem at the fan module, or a failed fan module itself.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

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.