What causes a SPN 873 code?

SPN 873 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 873 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 873 active.

How do I fix SPN 873?

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 873

J1939 SPN 873 — Engine Management parameter

What it means

SPN 873 indicates an issue with the Engine Management Parameter received over the J1939 network. This usually signifies a message timeout, data error, or out-of-range value regarding engine configuration or management instructions.