Driven around town where they don’t have the time or revs to get red hot and burn everything off, they will clog up. I purchased a city driven vehicle a few years back and my mechanic gave the DPF a ‘chemical clean’, it came up like new. I drive on the highway a lot so never had DPF issues in that regard.
I had an off car DPF clean done on my 2015 diesel Laredo in June last year as the vehicle was experiencing higher fuel consumption due to excessive DPF regens & fuel dilution. After an oil & filter change I would see the oil life % 1% for every 200km then at about the 800km mark the oil life would drop 1% for every 30km which meant I was doing oil changes about every 3-3500km when the oil life dropped to 0%. By doing excessive regens to clean the DPF the extra fuel in the oil wasn't getting enough time to evaporate off despite doing a lot of highway km. The solution was to clean the DPF off car in a machine, replace the DPF pressure differential switch & all came good. Also be aware that the engine cooling system needs to be at 80 deg C or higher for the regen system to think about operating so if your thermostat is broken your regen system may not function correctly. I now monitor the DPF soot % level & regen function with a Bluedriver.
My 2012 doesn't tell me the soot cookers level, haven't had a chance to give her a decent run since I got it a couple of months back, will be doing a 600k trip this weekend, hopefully blow some cobwebs out
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Dpf issues
2013 Jeep Grand Cherokee Laredo 4x4 CRD
