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Four Things to Know About Servicing Your Single Module™ Aftertreatment System

  1. DPF service intervals and actions have changed for many customers.

    Given the larger ash capacity of the Single Module aftertreatment system’s diesel particulate filter (DPF) and X15™ engine oil consumption improvements, many customers will now have maintenance intervals that extend past the warranty period. A light or message on the dash will indicate when service is needed (check vehicle information for notification method). If service is needed within the warranty period, Cummins will replace the DPF filter in place of cleaning it to ensure you’re operating with a certified, quality product that will meet our performance expectations. Outside of the warranty period, Cummins recommends use of our remanufactured DPFs to avoid issues that can be caused by incomplete cleanings.

    Maintenance intervals vary depending on engine platform. Click on the links below for specific recommendations:

    X15 Efficiency Series Engines

    X15 Performance Series Engines

    L9™ Engines

    B6.7™ Engines

  2. Customers need to check both the base engine warranty and the emissions warranty for available coverage on the aftertreatment system.

    In addition to the base engine warranty, aftertreatment systems may be covered by an Environmental Protection Agency/California Air Resources Board (EPA/CARB) mandated emissions warranty that offers coverage through 5 years/100,000 miles/3,000* hours for on-highway applications. In some instances, the base warranty may have expired, but the part of failure may be covered under the emissions warranty.  To check the emissions warranty, check: QuickServe Online > Warranty Administration Manual > U.S. and Canada Automotive Emissions Control System Warranty.

  3. Keeping the DEF dosing system clean helps the aftertreatment function more efficiently.

    Fault codes related to the diesel exhaust fluid (DEF) dosing system can typically be attributed to contamination in the system. To avoid the faults and potential damage to the system due to contamination, customers can perform a system flush. Cummins recommended flush procedure can be found here, but customers should always check the OEM service manual for additional recommendations for their application. Information on doing visual inspections for contamination and also best practices for storing DEF can be found here.

  4. Overall, servicing the aftertreatment system has become simpler.

    Easier access to the filter portion of the product – this saves time and money in the repair shop. In addition, the Cummins dosing system no longer requires the use of coolant lines and our Single Module aftertreatment has a single electrical connection, reducing hardware and software complexities and making the task of accessing equipment for service needs much easier.

*3,000 hours in the emissions warranty applies to CARB only.

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