What causes a SPN 280 code?

SPN 280 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 280 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 280 active.

How do I fix SPN 280?

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 280

J1939 SPN 280 — Fuel/Air parameter

What it means

SPN 280 indicates the Engine Air Filter Differential Pressure or Restricted Indicator has exceeded its normal operating range. Essentially, the engine is detecting too much vacuum or restriction in the air intake system.