What causes a SPN 310 code?

SPN 310 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 310 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 310 active.

How do I fix SPN 310?

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 310

J1939 SPN 310 — Fuel/Air parameter

What it means

SPN 310 is a generic J1939 parameter for 'Fuel/Air' ratio or pressure deviations. It indicates the Engine Control Module (ECM) has detected a value for air or fuel pressure that is outside the expected operating range or does not correlate with other sensor readings.