What causes a SPN 802 code?

SPN 802 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 802 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 802 active.

How do I fix SPN 802?

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 802

J1939 SPN 802 — Engine Management parameter

What it means

The SPN 802 generally refers to a mismatch or communication error regarding Engine Management Parameters being transmitted across the J1939 data link. It indicates that the expected configuration data does not match the actual data received.