What causes a SPN 480 code?

SPN 480 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 480 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 480 active.

How do I fix SPN 480?

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 480

J1939 SPN 480 — Fuel/Air parameter

What it means

In most J1939 implementations, SPN 480 indicates a general Fuel/Air Ratio imbalance or a specific Air Intake System restriction and/or excessive vacuum.