What causes a SPN 276 code?

SPN 276 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 276 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 276 active.

How do I fix SPN 276?

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 276

J1939 SPN 276 — Fuel/Air parameter

What it means

This code indicates a generic 'Fuel/Air Ratio' parameter error where the ECM detects an implausible relationship between the measured boost pressure and the metered fuel flow.