What causes a SPN 672 code?

SPN 672 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 672 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 672 active.

How do I fix SPN 672?

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 672

J1939 SPN 672 — Engine Management parameter

What it means

Engine Torque/Speed Limitation Rate (J1939 Engine Management) - This code indicates that the engine's torque or speed control is being limited by a parameter setting or an external input that does not align with the current operational state.