What causes a SPN 725 code?

SPN 725 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 725 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 725 active.

How do I fix SPN 725?

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 725

J1939 SPN 725 — Engine Management parameter

What it means

SPN 725 refers to the Engine Intake Manifold 1 Pressure parameter transmitted over the J1939 data link. It indicates that the system has detected a value that is out of range, erratic, or missing for the boost pressure.