Well we have seen these codes a few times before! The Mazda 6 suffers terribly from DPF (Diesel Particulate Filter) problems and we are seeing these faults on a daily basis.
Here is what these faults mean in layman’s terms.
P2458 00-2F Diesel Particulate Filter Regeneration Duration (Meaning: The regeneration process is active for a too longer period, caused by only a small reduction in back pressure during the regen process).
P2463 00-AF Diesel Particulate Filter – Soot Accumulation (Meaning: The DPF is blocked!)
P242F 00-AF Diesel Particulate Filter Restriction – Ash Accumulation (Meaning: The soot carrying capabilities of the filter has been reduced due to ash build up (waste product of regeneration))
P2459 00-2F Diesel Particulate Filter Regeneration Frequency (Meaning: The regeneration process is being initiated on a too regular basis, can be caused by a blocked filter or too many short journeys.)
Today for example we had a Mazda 6 2.2 dropped off for a DPF cleaning service, with the DPF light flashing and engine management light illuminated the customer already suspected he had DPF issues, however a quick diagnostic check and live data readings we confirmed this. A few hours later the DPF was cleaned, back pressure readings were reduced to an acceptable level and the vehicle was back on the road ready for the weekend Christmas shopping trip.