What causes a SPN 2473 code?

SPN 2473 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 2473 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2473 active.

How do I fix SPN 2473?

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

Log in Sign up

J1939 SPN

SPN 2473

J1939 SPN 2473 — Aftertreatment/Emissions parameter

What it means

Aftertreatment SCR Catalyst Outlet NOX level sensor detects the amount of nitrogen oxides exiting the tailpipe.

Sign in to view symptoms, probable causes, diagnostic steps, severity, and related codes

Log in Sign up free