A diesel particulate filter (or DPF) is a device designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine.

However, due to different driving styles, these filters can become blocked, causing various DPF problems like reduced engine performance and ultimately reduced combustion. Any make of vehicle fitted with DPF could be affected by this. The most likely type of vehicle to be affected by DPF problems are driving schools, taxis, delivery vans and those that covers only short journeys.
KMK offers effective and legal DPF problem solution to vast majority cars and vans.

1) Full fuel management system and DPF diagnostic and repairs.
2) DPF active regeneration  (normally available by main dealer only)
3) DPF Forced Regeneration (complex procedure not available at main dealer)
4) TUNAP chemical DPF cleaning (removes soot and unblocks DPF for active regeneration)
5) Removal and installation of new diesel particulate filter.







DPF removal and deletion is illegal modification, if you planing to continue using vehicle on public roads. Read more.

What can be done regarding DPF once it’s flagged as faulty.

If your vehicle developed DPF related fault, it needs to be booked to the workshop to be checked and repaired ASAP as continues driving even with limited power will negatively affect diesel particulate filter and more expensive treatment will be required. A special test is required to complete components condition evaluation. Then based on results, mileage and new components costs most effective solution is offered to vehicle owner.

DPF system related faults

like intermittent faulty operation of DPF back pressure measuring sensor due to fault in pipe connections, wiring connector or sensor it self. With faulty sensor if addressed on time, DPF normally does not need any treatment after fault elimination and memory reset.

Active DPF regeneration

procedure that is normally programmed in engines control module as option to trigger and complete regeneration by vehicle technician. Usually can be applied to cars and vans that failed multiple regeneration attempts due to required parameters not met like not being driven long enough at stable speed at right engine temperature with minimum required amount of fuel in tank. Required conditions for active regeneration do differ from one manufacturer to another but vehicle steady speed, engine temperature and fuel amount in tank generally applies to all.

Forced regeneration

– a special complex procedure most of the time applies to DPF (Diesel Particulate Filter) that has blockage values way above maximum allowed values but not reaching 0.7 BAR of back pressure.

Chemical cleaning & active / forced regeneration

– this procedure is called also DPF cleaning but regeneration needs to be achieved afterwards in order no to waste the effort. DPF cleaning is most of the time applied by technician to DPF (Diesel Particulate Filter) that has high blockage values. Back pressure read is usually close to 0.9 Bar.

DPF removal, chemical cleaning & forced regeneration

– this procedure is offered to DPF ( Diesel particulate Filter) which has excessive blockage readings with back pressure values exceeding 0.9 Bar. Mileage of the car is usually above 100k miles. Chemical more intense pressure cleaning applied. Replacement option of old DPF is also addressed at this stage as treatment might not be long lasting due to excessive wear of original DPF.

New DPF installation

– this is usually offered to vehicles with high mileage of 110k-120k miles and regularly driven on motorways yet still developing DPF related faults.