Hi Piotr, i couldn't agree with you more as we carry out many DPF removals and DPF software deletions on a regular basis.

We first correctly diagnose and repair any faults, then carry out a forced or induced active regen making sure the fill counters are normal and then we speak with the customer. Dependent on the reason for failure and taking into account the vehicles use, it's driving style and if the vehicle is still under warranty, we will advise the customer of his best options.

My post and request for help refers to a trade customers car sales vehicle that came to us having already had it's DPF removed but without the usual pre-removal steps being carried out. Even though we fitted a borrowed DPF from another vehicle and carried out our normal procedure the vehicle is posing problems for the independent re-mapping company we use.

Between us we have almost cracked this problem having spent many hours driving the vehicle and monitoring DPF related information, anyone's help however would still be appreciated.

Regards Eddie Zyla.