What causes a SPN 288 code?

SPN 288 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 288 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 288 active.

How do I fix SPN 288?

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 288

J1939 SPN 288 — Fuel/Air parameter

What it means

J1939 Network Error: Invalid or Missing Fuel/Air Control Data. This is a communication-side fault rather than a physical sensor failure.