What causes a SPN 3682 code?

SPN 3682 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 3682 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3682 active.

How do I fix SPN 3682?

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 3682

J1939 SPN 3682 — Body/Chassis parameter

What it means

SPN 3682 usually indicates a 'Special Instructions' or 'Inability to receive data' related to the Body/Chassis interface. It often signals that the engine controller expects data from a body-side device that is missing or incorrect.