One issue I've read is about the DPF. In those articles, the DPF will be clogged up with soots and/or carbon buildups. It will now throw a code and the car will go on limp mode. The primary cause of this DPF issue is when the car is mainly used to drive around the city. Diesel Particulate Filter (SKYACTIV-D 1.5 and SKYACTIV-D 1.8) The diesel particulate filter collects and removes most of the particulate matter (PM) in the exhaust gas of a diesel engine. PM collected by the diesel particulate filter is cleared during normal driving, however, PM may not be removed and the diesel particulate filter indicator Mazda 6 diesel - Mistake, or not? - skidpan. The way the Mazda carries out its regens isnt very impressive, usually its based on mileage not use, on the 2017 model update, the timed intervals are now about 300 miles. The 2 diesels we have owned with DPF did their regens in a very different way. Mazda SKYACTIV-D 2.2L has many unique features even when compared with a conventional diesel engine. For this reason, we are providing the following necessary basic information for service. Please familiarize yourself with the material so that you understand and can explain the unique features and operation of this engine.I. TECHNICAL FEATURES Re: Mazda CX-5 2.2 SkyActiv-D - DPF filling fast Post by spektr » Sun Mar 14, 2021 6:25 am That was the first implementation of DPF, many car manufacturers had problems with it. Its not the dpf, work for Mazda dealer. We have never replaced a dpf on the 2.2 skyactiv engine ever. They dont give issues. You have four faulty injectors. There is also no point in anyone testing them as they wont show up faulty. The fault code you got from Mazda P243c is to do with over fueling from the injectors. This is common. M75kjyr.