What causes a U0412 code?

U0412 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 U0412 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0412 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

U0412

Network/CAN bus communication code U0412

What it means

Invalid data received from the Battery Energy Control Module A. This usually pertains to hybrid or electric battery management systems sending incorrect bus data.