What causes a SPN 3181 code?

SPN 3181 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 3181 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3181 active.

How do I fix SPN 3181?

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 3181

J1939 SPN 3181 — Body/Chassis parameter

What it means

SPN 3181 refers to signals/data received from the Body or Chassis system via J1939 that are invalid, missing, or inconsistent with expected engine parameters.