Cummins Fault Code 6416

19/12/2025

Overview

CODE

REASON

EFFECT

Fault Code: 6416
PID:
SPN: 3703
FMI: 11/31
LAMP: None
SRT:

Regeneration of the diesel particulate filter has been prevented due to the permit switch being disabled.

Possible frequent need for aftertreatment regeneration.

Cummins Fault Code 6416 — Engine Control Module (ECM)

Circuit Description

The OEM truck manufacturer can install a permit switch in the dash or send an inhibit message via the J1939 data link to the engine ECM. The function of the inhibit message is to prevent the aftertreatment system from performing mobile regenerations.

Component Location

The aftertreatment regeneration permit switch can be an actual switch in the vehicle dash or it can be a J1939 message sent via the J1939 data link. Refer to the OEM service manual.

Conditions for Running the Diagnostics

This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.

Conditions for Setting the Fault Codes

The Engine Control Module (ECM) detected the aftertreatment diesel particulate filter regeneration permit switch was disabling regeneration while the ECM was requesting active regeneration of the aftertreatment diesel particulate filter.

Action Taken When the Fault Code is Active

The ECM logs the fault code immediately when the diagnostic runs and fails.

Conditions for Clearing the Fault Code

To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
The fault code status displayed by the recommended Cummins electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
The “Reset All Faults” command in the recommended Cummins electronic service tool or equivalent can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk

If this fault code is active and there has been damage to the aftertreatment system, the permit switch can possibly have prevented the aftertreatment system from performing a mobile (active) regeneration.

Consult with the OEM if the aftertreatment system has malfunctioned due to the permit switch.

Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.

XTuning.VN