What causes a U0711 code?

U0711 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 U0711 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0711 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

U0711

Network/CAN bus communication code U0711

What it means

Communication failure with Central Gateway module or CAN bridge. This indicates the primary networking controller is not receiving signals on an auxiliary data bus.