What causes a SPN 472 code?

SPN 472 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 472 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 472 active.

How do I fix SPN 472?

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 472

J1939 SPN 472 — Fuel/Air parameter

What it means

SPN 472 is a generic J1939 parameter identifier for Fuel/Air data. It signals that one or more sensors providing data for the fuel-to-air ratio calculation are sending invalid or inconceivable signals to the ECM.