What causes a SPN 287 code?

SPN 287 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 287 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 287 active.

How do I fix SPN 287?

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 287

J1939 SPN 287 — Fuel/Air parameter

What it means

SAE J1939 Network Message Error - Common on heavy-duty vehicles (Cummins, Detroit, Paccar) when the ECM receives invalid data from other vehicle controllers via the CAN bus.