What causes a SPN 3941 code?

SPN 3941 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 3941 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3941 active.

How do I fix SPN 3941?

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 3941

J1939 SPN 3941 — Body/Chassis parameter

What it means

SPN 3941 typically refers to a mismatch or error in parameters communicated between the Chassis Controller and the Body Controller. It often indicates that the vehicle configuration setup does not match the data being received over the J1939 network.