What causes a U0411 code?

U0411 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 U0411 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0411 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

U0411

Network/CAN bus communication code U0411

What it means

Invalid data received from the Transmission Control Module (TCM). This indicates the engine or body controller is receiving corrupt or incorrect signals regarding gear selection or speed.