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DPF Removal and Remap

To control DPF & EGR SOLUTION.


A DPF (Diesel particulate filter), filters the harmful pollutants coming out from the engine. It can filter the particles up to 1 micron. It has a metal shell just like a catalytic convertor. DPF removal remap can have any of the below-mentioned filters:

  • Cordierite wall flow filters
  • Silicon carbide wall flow filters.
  • Metal fiber filters.
  • Metal fiber flow-through filters

Regeneration is a process in which trapped particles or particulate are burned from time to time. There are 3 types of regeneration:

  • Spontaneous
  • Dynamic
  • Service
DPF Removal and Remap


Spontaneous regeneration occurs when the DPF reaches a temperature of 600 deg C. If spontaneous regeneration doesn’t occur even after crossing 600 deg C temps and the particulate storage capacity of DPF has reached its maximum the ECU (Electronic Control Unit) initializes Dynamic regeneration. The engine should be running while DPF is undergoing Dynamic regeneration. If the engine stops in the middle of the regeneration process, it is again reinitiated by the ECU next time. But if the dynamic regeneration process is interrupted many times because of short engine running cycles, then Service regeneration is needed. It’s an alert. One should not ignore it. During service regeneration, extra fuel might be needed to reach high temperatures (600 deg C) in order to burn the particulate.

DPF forced regeneration

Forced regeneration is the highest level of regeneration. It is done when soot accumulation is very high in DPF. It’s done by using appropriate diagnostic software by a professional. It changes the coding inside the ECU. ECU allows fuel injection in DPF to burn all the accumulated soot. The process takes 20 to 30 min but the time duration depends upon the amount of soot

DPF additive

It’s a chemical that is mixed with fuel to burn the soot. Adding a DPF additive lowers the temperature at which the soot burns.

DPF removal vs DPF delete

DPF removal means cutting off the whole filter from a vehicle. Removal of DPF causes ECU error. We reprogrammed the ECU after the removal. In DPF deletion only ECU is reprogrammed to remove the DPF functionality from the software.


If your DPF warning light or Anti-Pollution warning is on Dash, do not ignore it. Ignoring it will cost you much more in additional repair bills and it can be dangerous.
Forced regeneration by a garage or a “blast down the motorway” is not likely to cure the problem, these only work as preventative maintenance. So at this stage realistically you have the following options:-

  • DPF Regeneration PSL Tuning can offer a regeneration service.
  • Replacement – PSL Tuning can replace the DPF, normally at a fraction of the main dealer cost.
  • Cleaning – PSL Tuning offer a DPF cleaning service
  • Delete Recalibration – If you have had your DPF removed , We may be able to recalibrate your vehicles ECU to stop your engine going into limp-safe mode and clear the DPF warning light.Most customers also benefit by having a performance remap alongside the DPF remap which provides even better gains than just the DPF Removal itself. The benefits of DPF removal are as follows:
  • No expensive DPF replacement costs.
  • No more limp modes when the vehicle decides to do a forced regeneration.
  • Improved MPG due to the removal of an air restriction allowing the engine to breather better.

You must be aware of the legal implications of this.


Some manufacturers use additives to reduce the ignition point of the soot particles by adding small amount of special fluid calls ADBLUE into the fuel tank which mixes with the fuel.


Failed sensors preventing DPF regeneration.

Lack of additive in fuel (where fitted) causing incomplete burn off.

Engine issues i.e. leaking injector, valve stem oil seals, worn piston rings.

Local or Town Driving ,DPF won’t regenerate due to not reaching high temperature.

Poor maintanance of engine.


A widely adopted route to reduce NOx emissions is Exhaust Gas Recirculation (EGR). This involves recirculating a controllable proportion of the engine’s exhaust gas back into the intake air system.

The substitution of burnt gas (which takes no further part in combustion) for oxygen rich air reduces the proportion of the cylinder contents available for combustion. This causes a lower heat release and peak cylinder temperature, and reduces the NOx.

On a diesel engine the recirculated fraction may be as high as 50% under some operating conditions.


The EGR valves can become clogged with carbon deposits, causing them to fail or stick, thereby causing error codes and the vehicle not to run correctly. Our software solution to disable the EGR valve is a simple and effective method of improving the efficiency of your engine.