What causes a SPN 244 code?

SPN 244 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 SPN 244 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 244 active.

How do I fix SPN 244?

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

J1939 SPN

SPN 244

J1939 SPN 244 — Fuel/Air parameter

What it means

Wheel-Based Vehicle Speed signal is invalid or missing over the J1939 data link. The ECM is not receiving consistent speed data from the ABS or Transmission controller.