What causes a SPN 2875 code?

SPN 2875 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 2875 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2875 active.

How do I fix SPN 2875?

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 2875

J1939 SPN 2875 — Aftertreatment/Emissions parameter

What it means

SCR System Information Parameter Inconsistency / Aftertreatment Configuration Error. This code typically indicates that the engine controller (ECU) and the aftertreatment controller (ACM/DCU) have mismatched or corrupted configuration parameters regarding the emissions system.