What causes a U0561 code?

U0561 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 U0561 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0561 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

U0561

Network/CAN bus communication code U0561

What it means

Invalid data received from Cruise Control Module. This indicates the primary controller is getting data that is logically incorrect or out of range over the CAN bus.