What causes a U3463 code?

U3463 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a U3463 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U3463 active.

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

OBD-II

U3463

Manufacturer-specific network code U3463

What it means

Communication error involving the telematics or fleet management interface. This prevents the vehicle from reporting location or health data to remote servers.