What causes a SPN 3724 code?

SPN 3724 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 3724 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3724 active.

How do I fix SPN 3724?

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 3724

J1939 SPN 3724 — Body/Chassis parameter

What it means

Particulate Trap Active Regeneration Status - This code typically triggers when there is a mismatch or data error between the engine ECM and the Body Controller regarding regeneration inhibits or PTO operations.