Driver Tips. For Cummins On-Highway Heavy-Duty And MidRange Engines With Aftertreatment.

This guide covers engine, aftertreatment and emissions-related indicator lamps* found on your vehicle’s instrument panel and explains what they mean and the actions drivers need to take when they illuminate. Important information about fuel, oil, Diesel Exhaust Fluid (DEF) and operating tips is also included. For fire and emergency vehicle applications, please reference Bulletin 4971316. General Engine Indicator Lamps. Check Engine Lamp Or Amber Warning Lamp The Check Engine Lamp (which may also be referred to as the Amber Warning Lamp) illuminates when the engine needs to be serviced at the...

Diesel Exhaust Fluid For Selective Catalytic Reduction (SCR) Aftertreatment. Every 2010 and newer vehicle has an on-frame storage tank for Diesel Exhaust Fluid (DEF) and a dash lamp that indicates low DEF levels. Refilling this tank with DEF is critical in order for your vehicle to comply with U.S. Environmental Protection Agency (EPA) emissions regulations. Diesel Exhaust Fluid (DEF) Lamp Illuminated An illuminated DEF Lamp is an indication that the DEF level is low. This can be corrected by refilling the DEF tank with Diesel Exhaust Fluid. Flashing A flashing DEF Lamp indicates that the DEF...

Diesel Particulate Filter (DPF). The DPF is an integral component of the aftertreatment system on every 2007 and newer vehicle. It captures Particulate Matter (PM) in a wall-flow ceramic filter. The exhaust system periodically undergoes regeneration, raising temperatures to oxidize captured PM and clean the system. Lamps alert the driver when a regeneration is needed. High Exhaust System Temperature (HEST) Lamp The HEST Lamp illuminates to indicate that high exhaust temperatures may exist due to aftertreatment regeneration. This is normal and does not signify the need for any kind of vehicle...

How To Perform A Parked (Stationary) Regeneration. If the vehicle has a Manual Regeneration Switch and the DPF Lamp is flashing: ■ Park vehicle in an appropriate location, set parking brake, and place transmission in Park (if provided) or Neutral, and allow up to one hour for the regeneration. ■ Set up a safe exhaust area. Confirm that nothing is on or near the exhaust system surfaces. ■ Ensure that your fast-idle and Power Take-Off switches are off before starting regeneration. ■ Push the Manual Regeneration Switch to begin a parked regeneration. Note: Engine speed will increase, and there may...

Items Driver Will Notice. ■ Under certain conditions (cold or very dry), condensation in the form of water vapor can be seen coming from the vehicle tailpipe. This is normal. It will clear within a few minutes of normal vehicle operation. ■ If the engine is left at idle for significant periods of time without reaching the minimum exhaust operating temperatures, the engine will automatically increase the engine idle speed for several minutes to maintain the condition of the particulate filter. This can be interrupted by pressing either the service brake or the clutch. ■ After prolonged idle, you...