What causes a SPN 926 code?

SPN 926 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 926 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 926 active.

How do I fix SPN 926?

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 926

J1939 SPN 926 — Engine Management parameter

What it means

SPN 926 refers to the Engine Management System parameter on the J1939 data link. This is typically a communication fault indicating that the network is unable to properly transmit or receive data related to engine management orchestration.