What causes a SPN 3711 code?

SPN 3711 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 3711 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 3711 active.

How do I fix SPN 3711?

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 3711

SPN 3711 — Aftertreatment 1 DPF Active Regeneration Inhibited - Switch

What it means

SPN 3711 indicates that the Active Regeneration Inhibited Switch is active, preventing the aftertreatment system from performing a necessary automatic DPF regeneration.