What causes a SPN 376 code?

SPN 376 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 376 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 376 active.

How do I fix SPN 376?

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 376

J1939 SPN 376 — Fuel/Air parameter

What it means

The Fuel/Air parameter code indicates a discrepancy or fault in the fuel metering system, typically involving the fuel delivery control or the fuel rack position sensor.