What causes a SPN 2747 code?

SPN 2747 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 2747 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 2747 active.

How do I fix SPN 2747?

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 2747

J1939 SPN 2747 — Aftertreatment/Emissions parameter

What it means

SPN 2747 typically refers to an electrical fault or performance issue within the Aftertreatment DEF Dosing System, specifically relating to the SCR Diesel Exhaust Fluid Pressure Control or the Pump Motor.