What causes a SPN 3381 code?

SPN 3381 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 3381 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3381 active.

How do I fix SPN 3381?

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 3381

J1939 SPN 3381 — Body/Chassis parameter

What it means

J1939 SPN 3381 indicates an issue with the Body/Chassis data received over the J1939 CAN bus. This often relates to an 'External Station Configuration' or discrete body status parameters that the ECM expects but finds invalid or missing.