Basic Information About DPF Cleaning Service, GPF, AdBlue, and SCR
A DPF (Diesel Particulate Filter) is a filter installed in the exhaust system of diesel vehicles. Its function is to capture soot and ash generated during fuel combustion. This filter prevents harmful particles from being released into the atmosphere, helping vehicles comply with emission standards.
The DPF filter traps soot particles in a special ceramic structure resembling a honeycomb. When the filter becomes full, the soot is burned off during the DPF regeneration process, restoring the filter’s efficiency.
Regeneration is the process of burning off accumulated soot at high temperatures. There are three types of regeneration:Passive regeneration – Occurs naturally during motorway driving when exhaust temperatures are high.
Active regeneration – The vehicle’s ECU triggers extra fuel injection to increase exhaust temperature and burn off soot.
Forced regeneration – Conducted in a workshop using diagnostic tools when the filter is excessively clogged.
A GPF (Gasoline Particulate Filter) is used in petrol engines with direct fuel injection. It operates similarly to a DPF but regenerates more easily due to the higher exhaust temperatures in petrol engines.
A catalytic converter is a component of the exhaust system that reduces harmful gas emissions such as NOx, HC, and CO. It converts toxic substances into less harmful chemical compounds.
SCR (Selective Catalytic Reduction) is a system that reduces nitrogen oxide (NOx) emissions by injecting AdBlue into the exhaust system.
AdBlue is a liquid consisting of urea and demineralised water. When injected into the exhaust system, a chemical reaction occurs, converting harmful NOx into harmless nitrogen and water.
DPF CLEANING SERVICE
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Causes of Filter Blockages and Unfair Practices by Competitors
Short trips – Insufficient conditions for regeneration.
Injector problems – Excess fuel increases soot production.
Faulty turbocharger – Oil leaks can clog the filter.
Low-quality fuel – Leads to higher soot emissions.
Issues with AdBlue and SCR systems – Can contribute to excessive DPF contamination.
Loss of engine power.
Increased fuel consumption.
Smoke from the exhaust.
Rising engine oil levels.
The engine switching to limp mode.
Not always! We have had customers visit us after being advised by dealerships to replace their DPF filters for thousands of pounds. After conducting diagnostics, we often find that the real cause is something else, such as oil leaks or faulty injectors. Once the root problem is resolved and the DPF is cleaned, the filter functions like new – at a fraction of the replacement cost.
The AdBlue system is crucial for reducing nitrogen oxide emissions, but failures can lead to severe exhaust system problems:Leaking AdBlue injector – Causes AdBlue crystallisation, leading to hard deposits in the exhaust system, potentially clogging pipes and disabling the SCR system.
Clogged SCR filter – Excess AdBlue accumulates, restricting airflow and causing exhaust emission errors.
Incorrect AdBlue dosing – A faulty control system may inject too much or too little AdBlue, reducing SCR efficiency and increasing DPF load.
AdBlue pump failure – Low system pressure can trigger dashboard warning lights and failure to reduce NOx emissions.
AdBlue warning light on the dashboard.
Messages about limited mileage before the vehicle stops.
Loss of power and limp mode activation.
Incorrect exhaust emissions and a strong ammonia smell.
Increased fuel consumption.
Many vehicle owners consider removing the AdBlue system or DPF filter, especially due to high repair costs. Companies like Best Remaps offer professional ECU remapping services, allowing the AdBlue, DPF, EGR, and other systems to be disabled. This helps avoid frequent failures and reduces vehicle maintenance costs.
For more information, visit bestremaps.com Visit Best Remaps
Fake DPF cleaning warranties (12-24 months) – Customers are promised a warranty, but when their filter clogs again, they are told that another issue (e.g. faulty turbo or leaking EGR) caused it, voiding the warranty. They often have to pay again for cleaning, even though the root issue was never properly addressed.
Wet DPF filters – a shortcut at the customer’s expense – Many garages only clean the filter without drying or flow testing it properly. Some companies return the DPF while still wet to save time.
✅ At our company, every DPF is thoroughly dried and tested to ensure quality cleaning!
How Our Company Cleans DPF Filters
Simply cleaning the filter does not always fix the problem – the root cause must be identified.
Many companies clean filters without diagnostics, leading to recurring issues.
We take a comprehensive approach – starting with diagnostics, choosing the best cleaning method, and performing final testing.
Every customer receives free initial DPF diagnostics.
We check error codes, filter blockage levels, and potential causes (e.g. turbo, injectors, EGR, AdBlue issues).
Customers don’t pay for unnecessary cleaning if their DPF is not actually clogged. Instead, they get a precise diagnosis of the real issue.
Depending on the level of blockage, we select one of three cleaning levels:Stage 1 – Forced regeneration if the filter is lightly clogged.
Stage 2 – Chemical cleaning for more severe contamination.
Stage 3 – Hydrodynamic machine cleaning for completely blocked filters.
Uses advanced diagnostics to force soot burning.
Takes between 15 minutes to an hour, depending on blockage level.
Effective for mild clogs – if contamination is severe, we proceed to chemical cleaning (Stage 2).
Specialist cleaning fluid is injected through the temperature or pressure sensor, dissolving soot and ash.
The filter is then blown through and tested for performance.
Used for moderately clogged filters – severe cases require hydrodynamic cleaning (Stage 3).
3.6. Stage 3 – Hydrodynamic Machine Cleaning
The DPF is removed and connected to a professional cleaning machine.
The process includes:
✔️ High-pressure flushing in both directions.
✔️ Drying the filter for proper airflow measurement.
✔️ Final testing to ensure full cleaning effectiveness.
Many companies return wet filters, causing incorrect sensor readings and rapid re-clogging.
At our company, every DPF is dried and airflow-tested before reinstallation.
We reset adaptive values and check vehicle performance.
If we find other issues (e.g. faulty injectors, turbo leaks), we inform the customer.
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