What causes a SPN 364 code?

SPN 364 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 364 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 364 active.

How do I fix SPN 364?

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 364

J1939 SPN 364 — Fuel/Air parameter

What it means

SPN 364 is a general J1939 parameter code indicating that a module on the data link is broadcasting or receiving an 'Out of Range' or 'Invalid' Fuel/Air ratio command or value.