Common DEF Issues and Solutions. 2.1 Issue 1: DEF Contamination. 2.2 Issue 2: DEF Freezing. 2.3 Issue 3: DEF Quality. 2.4 Issue 4: Incorrect DEF Levels. 2.5 Issue 5: DEF Pump and Injector Problems. 2.6 Issue 6: DEF System Tampering. 3 3. Preventive Measures. Diesel Particulate filters (DPF) or ‘traps’ do just that, they catch bits of soot in the exhaust. As with any filter (think of the bag in your vacuum cleaner) they have to be emptied regularly to maintain performance. For a DPF this process is called ‘regeneration’ – the accumulated soot is burnt off at high temperature to leave only Dpf, diesel particulate filters became a legal requirement in order for diesel cars to meet Euro 5 specification, which was introduced throughout Europe in 2009, and so if you have a diesel car, with a factory build date after 2008, then it is almost certain that your car will have a DPF system fitted. All Nissan Qashqai’s with 2.0 litre diesel engines were fitted with DPF systems from design, this means that every 2.0 Diesel Qashqai will have a Diesel Particulate Filter fitted, and it would be impossible to find one without, at least not legally. However the smaller 1.5dci engine, designed by Renault meet the original EU5 emissions from Many issues related to diesel cars can be related to its ‘diesel particulate filter’, or DPF. Mandatory on all new diesels since 2009, DPFs capture dirty particulate matter from the exhaust. Yes. Many diesel cars have a catalytic converter, but not in the same way that a gas-powered car does. Some diesel engines contain a two-way catalytic converter with a diesel oxidization catalyst, but it could be a three-way design that adds an SCR reduction. Diesel engine emissions go through four stages: there’s the EGR (Exhaust Gas Our Gen 3 was diesel and we have a mix of months with fairly short journeys mixed with weeks of long distance driving and have never had any dpf issues, even with other makes of car, Renault, Citroen. It sounds a more deep seated problem than just the dpf, as it re-occurred after they changed the filter. October 2, 2020. Mercedes-Benz USA and its parent automaker, Daimler AG, will pay more than $2 billion to settle allegations of emissions cheating on diesel-powered vehicles, including sedans A total of 264,170 vehicles are affected by this class action, including some of Toyota’s most popular and successful models. The class action relates to defective diesel particulate filter (DPF O.P. Hi. We’ve had issues with our 2012 Subaru Outback and it’s dpf. Intake and turbo pipe have both been replaced. The light is regularly coming on and causing us many trips to the mechanic. Dpf has been cleaned and oil has been changed when required as determined by service schedule or when the fault code appears. RB0rAON.