The P2459 Ford will set if the Engine Control Module (ECM) detects that the average time between completed regenerations is less than a calibrated threshold. The particulates in the exhaust gases are collected by the Diesel Particulate Filter (DPF). When the filter becomes saturated with particulates, they are incinerated by a regeneration process.

Reaction score. 0. Sep 3, 2021. #1. Hey all, Have a 2020 6.7 with 37k miles. About 10 days ago got a check engine light with code P2459- Frequent Regen. My truck had been running a Regen about every 25 miles. As soon as one would end another would start. My driving is about half highway and half local road.

But if the DPF is too clogged with soot, the active regeneration cannot take place and the extra fuel dribbles down the bores contaminating your lube oil and raising its level. Decent superfuel such as Shell V-Power Nitro Plus helps (I ran a Mazda 6 Skyactiv on it for 14,000 miles, no trouble). Stuff like 'Cataclean' might help but I can't Particulate mass concentration is a crucial parameter for characterising air quality. The diesel particulate filter (DPF) is the primary technology used to limit vehicle particle emissions, but it needs periodic cleaning, a process called regeneration. This study aims to assess the impact of active DPF regeneration on the performance and emissions of Euro 5 and 6 vehicles. The study examined
Excess carbon which blocks the DPF frequently is caused by bad combustion in the cylinders. The likely culprit are the injectors as I believe there was either a bad batch of nozzles fitted to 2013-on, not sure on range of years, but I have heard up to 2016. It is well known to Mazda local head offices, but not the dealers.
What Does the Engine Code P243C Mean? Character "P" in the first position of Diagnostic Trouble Code (DTC) represents the powertrain system (engine and transmission), "2" in the second position means that this is a ISO/SAE controlled OBD-II (OBD2) DTC. "4" in the third character position in a DTC indicates that the auxiliary emission controls system is experiencing a malfunction. T34gvix.
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    • mazda 6 dpf regeneration frequency