What causes a SPN 365 code?

SPN 365 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 365 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 365 active.

How do I fix SPN 365?

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 365

J1939 SPN 365 — Fuel/Air parameter

What it means

SPN 365 specifically monitors the Fuel Rack Position or Mechanical Fuel Control parameters on heavy-duty diesel engines. It indicates the ECM has detected a signal from the fuel rack that is out of range, erratic, or inconsistent with the commanded position.