What causes a U0244 code?

U0244 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 U0244 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with U0244 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

U0244

Lost Communication With Standing Heater Control Module

What it means

The auxiliary/sleeper heater (APU/Bunk heater) lost communication with the main network. Climate control during rest periods is affected.