What causes a SPN 722 code?

SPN 722 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 722 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 722 active.

How do I fix SPN 722?

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 722

J1939 SPN 722 — Engine Management parameter

What it means

SPN 722 indicates a fault with the Fuel Shutoff Valve (Inlet) circuit, typically signifying an open circuit, short to ground, or short to power.