NOTE: Do not interrupt regeneration once it has been initiated. When this code is detected, the operator has two minutes to execute the entry conditions:1. Cycle clutch switch (Manual transmission).2. Cycle parking brake.3. Cycle neutral switch (Automatic transmission).4. Then initiate regeneration request. NOTE: If this procedure is not completed within this time limit, the engine will shut down and the regeneration procedure must be restarted. NOTE: When this code is active, driver has 2 minutes to execute the entry conditions: Cycle clutch switch, parking brake, neutral switch (automatics), and then initiate the regen process. If not completed, engine will shut...

NOTE: Silent code that logs when the diesel particulate filter regeneration lamp is flashing in ” Regen Zone 2″. This code is informational only and used by service to help understand which dash lights illuminated during normal service. A stationary regeneration is required if the fault code is active. No action is required for an inactive fault code. NOTE: This is a silent code that logs when the DPF is in “Regen Zone 2”. If this code is staying active you need to perform a regen.

IMPORTANT: Replace DPF and perform the Ash Accumulator reset using the diagnostic service tool. NOTE: The DPF lamp will illuminate and code 3720/15 will log when the truck reaches the appropriate mileage interval. This fault indicates that the DPF needs to be replaced and the DPF Ash Accumulator routine in the diagnostic service tool must be completed. This routine can be found in the actions drop-down menu and must be completed after the DPF has been replaced. NOTE: Using alternate cleaning methods may result in the cleaned DPF failing to reach the next ash clean interval. There may be damage...

IMPORTANT: Replace DPF and perform the Ash Accumulator reset using the diagnostic service tool. NOTE: This code indicates the DPF has reached the end of its service life and must be replaced. Replace the DPF or attempt to have it cleaned.

NOTE: Please see the step by step troubleshooting procedures for this specific code.