What causes a SPN 2555 code?

SPN 2555 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 2555 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2555 active.

How do I fix SPN 2555?

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 2555

J1939 SPN 2555 — Aftertreatment/Emissions parameter

What it means

Exhaust Gas Recirculation (EGR) Cooler Temperature sensor data is above normal operating range.

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

Log in Sign up free