DPF maintenance is crucial when it comes to keeping your truck on the road. Manufacturers have come up with different types of systems, mostly a 1-box configuration with newer systems as well as separate component systems. In addition, they both consist of a DOC/DPF and a SCR catalyst. These systems depend on each other to give accurate readings to prevent the MIL light from being triggered. It’s very important that you use the correct shop to troubleshoot your problem.
Check engine lights, MIL, DTS and any other notification issues are mostly linked to the aftertreatment systems (if the unit was equipped with one). Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF) work together to filter out particulate matter. However, diesel engines emit two types of exhaust gases known as particulate matter and NOx. OEM recommends removing ash from your DPF and DOC at 400,000 plus miles. Idling engines will contribute to more soot and may cause systems to require maintenance earlier.