Re: Discussions about DPF « Reply #75 on: March 29, 2015, 07:26:44 pm » Hello Everyone, I'm new to the forum, I have a Mazda 6 2.2 diesel I am having some problems with frequency active regens of the dpf does anyone have any advice?
P2458 – DPF regeneration duration; P2459 – DPF regeneration frequency; P2463 – DPF Restriction – Soot accumulation; P244A – DPF Pressure too low (Bank 1) How to fix the dpf problem. There are 3 solutions available to fix Jeep Grand Cherokee dpf issues and below we will discuss each option. Forced Regeneration
This effect is also expected to lengthen the time between DPF regenerations and reduce the fuel consumption penalty that is associated with soot loading and regeneration. This study investigated the effect of FAME content, up to 50% v/v (B50), in diesel fuel on the DPF regeneration frequency by repeatedly running a Euro 5 multi-cylinder bench

They drove it around town for like 10 miles and would call back saying they couldn't duplicate. The last time i picked it up it started a regen and the check engine light came on. I took it back and they pulled code P2459 (DPF regeneration frequency) they brought it back in and said well you only have 8% oil life left and that must be why.

If the DPF runs more than three times in an allotted time frame, code P2459 will be set. Driving on consistently short trips may cause this code to set as the engine needs to cruise down the highway for long periods to effectively run regeneration. Driving with this trouble code is not recommended. A vehicle with this code should be taken in to
P2459 Code: Diesel Particulate Filter Regeneration Frequency - In The Garage with CarParts.com Learn what a P2459 code means, the issues that could trigger it, and the symptoms associated with it.
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mazda 6 dpf regeneration frequency