Catalytic Converter Delete (Cat Off)
ECU software that prevents the warning light and power loss on cars with a removed or replaced catalytic converter.
DPF/FAP Delete
A motorsport-focused software solution for the faults, power loss and limp mode caused by a clogged diesel particulate filter (DPF/FAP).
- Diesel
- ~2–4 hours
- Track / Motorsport
Legal notice · Track / motorsport only
Software for emission systems (catalytic converter, DPF/FAP, OPF, EGR, AdBlue/SCR, etc.) is intended solely for track / motorsport and closed-course use. Driving vehicles with these systems disabled on public roads, and presenting them for TÜVTÜRK inspection, may be against regulations. On request, the original software can be restored.
About the service
What is it and how does it work?
The DPF (Diesel Particulate Filter), also known as FAP in the PSA and Renault groups, traps soot particles in the exhaust of diesel engines. When the filter fills up, the ECU raises the exhaust temperature to burn off the soot; this is called regeneration. On cars used mainly for short trips and city driving, regeneration cannot complete and the filter clogs, resulting in problems such as a warning light, power loss, limp mode (emergency mode) and fuel diluting the engine oil.
DPF delete software disables the regeneration strategies, differential pressure sensor monitoring, soot load calculations and related fault codes in the ECU. Physically, the filter housing is emptied or replaced with a pipe. The software also adjusts the injection strategies accordingly so the engine runs properly and smoothly in its new configuration.
For road-going cars, our first recommendation is always DPF cleaning, a forced regeneration and fixing the sensor/injector problems that caused the clogging. A DPF delete increases particulate emissions and smoke opacity; it is only for track / motorsport and closed-course use and may cause problems at the TÜVTÜRK inspection. The original software is kept and can be restored on request.
Benefits
What do you gain?
- Eliminates regeneration-related limp mode and power loss
- Fixes differential pressure sensor and soot load faults
- An engine that breathes more freely with lower back pressure
- Eliminates the risk of fuel diluting the engine oil due to regeneration
- Can be combined with Stage software
Process
How is it done?
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01
Step 01
Fault memory and DPF data (soot load, differential pressure, regeneration history) are read.
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02
Step 02
The source of the clogging (sensor, injector, EGR, thermostat, etc.) is assessed; alternative solutions for road use are discussed.
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03
Step 03
The original software is backed up; DPF functions and related fault codes are disabled in the software.
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04
Step 04
After the physical work, checks are done with a road test and datalog.
FAQ
DPF/FAP Delete — FAQ
The most frequently asked questions about this service, with short answers.
Have another question?Message us with your car’s make, model and engine.
Would cleaning be enough instead of a DPF delete?
Often, yes. If the filter isn’t physically damaged, cleaning it and fixing the root cause of the blockage (sensor, injector, EGR, thermostat, etc.) keeps the car legal to drive on public roads. We look at this option first.
Will the car smoke after a DPF delete?
On a healthy engine with properly prepared software, there’s no noticeable black smoke; however, without the filter, particulate emissions rise and the tailpipe gets sooty. For this reason, the car may fail the emissions test.
What use is a DPF/FAP delete suitable for?
Only for track, motorsport and closed-course use. Driving a vehicle with its DPF disabled on public roads, or presenting it for inspection, may be against the law.
Compatibility
Which vehicles is it available for?
Availability depends on the car’s ECU type, engine and hardware. In our vehicle database, this option is listed for the number of engines below; you can check by selecting your own car.
- Engines
- 2.606
- Makes
- 37
- Share of database
- %33
- Volkswagen232 engines
- BMW222 engines
- Mercedes-Benz215 engines
- Ford177 engines
- Audi162 engines
- Renault145 engines
- Opel143 engines
- Peugeot142 engines
Software for emission systems is intended solely for track / motorsport and closed-course use; driving such vehicles on public roads and presenting them for TÜVTÜRK inspection may be against regulations. On request, the original software can be restored.
Vehicle Selector