Aftertreatment System Driver Notifications and Actions

Aftertreatment System Driver Notifications and Actions - Ops
Note: Examples are shown as EPA07; all notifications and driver actions will be the same on the DD platform. If it is determined a parked regeneration is required, reference model year specific section: "Performing a Parked Regeneration".

High Exhaust System Temperature Lamp

Instrument Panel Lamp Notifications and Description Driver Action
  • High Exhaust System Temperature (HEST) lamp
  • SOLID: Exhaust is at high temperature and vehicle is at low speed or parked.
  • FLASHING: A parked regeneration is in process and the system is not up to temperature.
  • No change in driving style required.
  • When parked, keep vehicle at a safe distance from people and flammable materials or vapors.

    Malfunction Indicator Lamp

    Instrument Panel Lamp Notifications and Description Driver Action
    • Malfunction Indicator Lamp (MIL)
    • Indicates a failure of an emission control device. May illuminate at the same time as the Check Engine Lamp (CEL).
    		 Vehicle can be driven to end of shift. If the MIL remains on after three drive cycles, call for service.

      Diesel Particulate Filter Regeneration Lamp

      Instrument Panel Lamp Notifications and Description Driver Action
      • Diesel Particulate Filter (DPF) regeneration lamp
      • SOLID: Indicates that a regeneration may be needed.
      • FLASHING: Indicates that a parked regeneration is required as soon as possible.
      • Diesel Particulate Filter (DPF) is reaching system limits.
      		 Perform a parked regeneration OR bring the vehicle to highway speeds to enable an automatic regeneration of the filter. Reference model year specific section: "Performing a Parked Regeneration".

        Diesel Particulate Filter Regeneration Lamp and the Check Engine Lamp

        Instrument Panel Lamp Notifications and Description Driver Action

        • Diesel Particulate Filter (DPF) regeneration lamp / Check Engine Lamp (CEL)
        • ENGINE DERATED
        • Indicates the Diesel Particulate Filter (DPF) has reached system limits.
        • A parked regeneration must be performed. Reference model year specific section: "Performing a Parked Regeneration".
        • If the parked regeneration exits and the lamps remain on, repeat the parked regeneration. If the second attempt fails, call for service.

          Diesel Particulate Filter Regeneration Lamp, Check Engine Lamp, and the Stop Engine Lamp

          Instrument Panel Lamp Notifications and Description Driver Action
          • Diesel Particulate Filter (DPF) regeneration lamp / Check Engine Lamp (CEL) / Stop Engine Lamp (SEL)
          • ENGINE SHUTDOWN
          • Indicates the Diesel Particulate Filter (DPF) has exceeded system limits.
          • A parked regeneration must be performed. Reference model year specific section: "Performing a Parked Regeneration".
          • If the parked regeneration exits and the lamps remain on, repeat the parked regeneration. If the second attempt fails, call for service.
          • Note: Engine can be restarted but a parked regeneration must be initiated within 30 seconds or the engine will shutdown.
            Note:
            Parent topic: Driver Notifications and Actions
            Document Number: 0000022373
            Manual Publication Date: 2024-03-05
            Topic Publication Date: 2023-12-10