What causes a SPN 3514 code?

SPN 3514 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 3514 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3514 active.

How do I fix SPN 3514?

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.

J1939 SPN

SPN 3514

J1939 SPN 3514 — Body/Chassis parameter

What it means

SPN 3514 is a generic J1939 parameter code indicating a configuration or communication mismatch related to the Body/Chassis interface. It often triggers when the vehicle's ECU detects that the programmed chassis parameters do not match the physical hardware installed by the body builder.