083 652 4662 morne@kaufner.co.za

DPF Delete (Software only)

We can remove all functions for DPF from the ECU not just the fault codes but regeneration and all other functions to do with DPF . The right way to do DPF Delete.

What is DPF?

A Diesel Particulate Filter (DPF or FAP for short) is a filter found in the downpipe section of the exhaust and is specifically designed to reduce the amount of Diesel Particulate Matter (Soot/Ash) passing through. The objective of this filter is to create cleaner / more eco friendly exhaust gases being released into the atmosphere.

A diesel particulate filter will gradually become restricted and more clogged up as a normal part of it’s service life. A process called regeneration is designed to occasionally ‘clear out’ the particulate filter. Unfortunately this needs specific driving conditions and when these are not met, the degree to which the filter is blocked can surpass the engine managements ability to regenerate the filter – leading to problems with power loss (see detailed list below) and even in the absolute worst case, risk to the car due to overheating of the filter.

The images below show different examples of the a DPF, as you can imagine with the first image this is very restrictive and easy to block causing fault codes and running problems on the car.


Potential Causes

Generally speaking a blocked DPF is usually caused by another underlying issue. It is worth undertaking further diagnostics to find the route cause of the blockage.

Things what could lead to a blocked DPF:

  • Short Journeys – Vehicles doing a lot of ‘town driving’ are a more likely to block up due to the DPF not getting up to temperature. For the DPF regeneration process to work effectively and burn off the carbon deposits the engine needs to frequently get up to temperature.
  • Faulty / Failed Sensors – DPF’s have several sensors that are installed before and after the filter. These sensors are fitted to monitor the Pre and Post temperature and pressure of the filter. If one or more of these sensors fail, the regeneration process may not be carried out effectively.
  • Faulty / Failed EGR Valve – The EGR Valve is designed to recirculate exhaust gases back into the engine before they pass through the DPF. If the EGR is not working effectively or blocked the amount of exhaust gases passing through the DPF will be increased potentially speeding up the DPF blocking.
  • Faulty / Failed Swirl Flaps – Similar to the EGR Valve the swirl flaps are fitted to help with the emissions control on the vehicle. If these are not working effectively it can potentially speed up the DPF blocking.

Failed Regeneration – For the DPF to regenerate there are certain conditions to be met. If these prerequisites are not met the DPF will fail to regenerate.