What causes a SPN 322 code?

SPN 322 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 322 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 322 active.

How do I fix SPN 322?

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 322

J1939 SPN 322 — Fuel/Air parameter

What it means

Cylinder #2 Injector Circuit - Current Below Normal or Open Circuit. This indicates the ECM detected a break in the electrical path to the second cylinder's fuel injector.