What causes a SPN 3587 code?

SPN 3587 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 3587 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3587 active.

How do I fix SPN 3587?

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 3587

J1939 SPN 3587 — Body/Chassis parameter

What it means

A generic Body Builder/Chassis auxiliary parameter fault indicating that an input or output signal related to secondary equipment (like a crane, dump bed, or PTO) is out of range or inconsistent with expected J1939 data.