What causes a SPN 3115 code?

SPN 3115 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 3115 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3115 active.

How do I fix SPN 3115?

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 3115

J1939 SPN 3115 — Body/Chassis parameter

What it means

SPN 3115 refers to 'Proprietary Network Parameter' or general 'Body/Chassis Parameter' issues. It typically indicates that a specific message or configuration expected from the Body/Chassis controller is missing, invalid, or out of range.