Dpf doesn't work for short journeys. On a 7 seater school run suv that is made for them sort of runs, that's unacceptable, thats what the car was made for. When them school run suv cars were being sold new they weren't advertised as not able to be used for that.DPF systems are designed for average mileage use with a good leeway, if you're outside of that bell curve, then you've chosen or been sold the wrong type of engined car.
The system hasn't 'failed' it has been unable to regen. due to requirements not being met and will flag a warning on the dash eventually, it's when the warnings asre ignored and a forced regen cannot be carried out that things get expensive. Autostop 'faults' are similar, we get vehicles in with 'autostop not working' concerns. Autostop is working fine, it is preventing engine stop to protect the discharged battery or keep the high electrical load maintained - in other words, it's doing what it was designed to do. Most vehicles have the ability to record usage stats, journery length, charge input, parking time etc. most of the ones with 'autostop not working' type concerns have a history of journey times <10 minutes which is never going to put back the charge taken from the battery just by starting the engine, especially if those 10 minutes were spent sitting in traffic, engine at idle speed on the school run...
Its unacceptable to say that's their problem, go and buy a high mpg petrol with crazy tax.
Before dpfs, diesels easily done school runs at 50 mpg and gave no trouble.
It also covers farmers in 4x4 for towing etc who does short journeys.
The heavy diesel was always best for towing. There's a reason why old landcruiser cost a fortune.
Is it any wonder a lot of people is holding onto the older vehicles because all the new stuff is overcomplicated scrap.
Dpfs have created a whole new problem that never existed.