What causes a U0792 code?

U0792 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 U0792 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0792 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

U0792

Network/CAN bus communication code U0792

What it means

Lost Communication With Exhaust Gas Recirculation (EGR) Cooler Bypass Control Module. The engine computer has lost the data link to the EGR cooling flap controller.