What causes a U3414 code?

U3414 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 U3414 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U3414 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

U3414

Manufacturer-specific network code U3414

What it means

Communication failure between the primary display unit (Instrument Cluster) and the vehicle telematic gateway. This disrupts the flow of live engine data to the dash gauges.