What causes a SPN 3680 code?

SPN 3680 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 3680 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3680 active.

How do I fix SPN 3680?

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 3680

J1939 SPN 3680 — Body/Chassis parameter

What it means

Loss of communication or unexpected data from a body-related component on the J1939 data link. This code indicates the Engine Control Module (ECM) is expecting specific data from the body/chassis controller that is missing or invalid.