Catalytic converter cleaning: Extend Lifespan, Cut Costs

The catalytic converter and the particulate filter are both part of the exhaust system, but they do different jobs:

• The catalytic converter converts toxic gases such as carbon monoxide (CO), nitrogen oxides (NOx) and hydrocarbons (HC) into less harmful substances such as carbon dioxide (CO₂) and water (H₂O). It works chemically and targets gaseous pollutants.
• The particulate filter (DPF), on the other hand, filters solid particles such as soot out of the exhaust gas. It is particularly important in diesel engines to reduce fine dust emissions. The particulate filter has to be cleaned or regenerated regularly because the particles settle in the filter.

Both systems often work together so that the exhaust gas meets environmental requirements for both gaseous and solid pollutants.

Professional catalytic converter cleaning at Advanpure GmbH costs €299.00 including VAT for cars and includes UPS pickup and return. For commercial vehicles such as trucks, buses or construction machinery, we prepare tailored quotes based on the specific requirements of the vehicle.

The recommended cleaning frequency depends on the vehicle type, operating conditions and mileage. For cars used mainly in town, cleaning every 50,000 to 100,000 kilometres can make sense, as frequent stop-and-go driving puts more strain on the catalytic converter. For commercial vehicles, trucks or machines with intensive operating hours and high loads, more frequent cleaning can be beneficial, for example every 40,000 to 60,000 kilometres. Cleaning at these intervals helps meet emission standards and keeps the catalytic converter performing at its best.

There are some typical signs that the catalytic converter is dirty:

• Loss of power: A dirty catalytic converter can reduce engine power because the exhaust flow is restricted.
• Higher fuel consumption: The engine has to work harder for the same output, so fuel consumption rises.
• Exhaust smell: A strong or unpleasant exhaust smell can point to problems in the catalytic converter.
• Warning light on the dashboard: In many modern vehicles, an engine warning light can indicate a fault in the exhaust system or in the catalytic converter itself.
• Abnormal emission readings: In the emissions test during the vehicle inspection, a dirty catalytic converter can lead to higher emission values.

These symptoms often indicate that the catalytic converter is clogged or dirty and needs cleaning.

Yes, catalytic converter cleaning is possible and worthwhile for almost every vehicle type. Cars and trucks as well as agricultural machinery and industrial vehicles benefit from cleaning. The type of catalytic converter can vary, for example oxidation catalysts for diesel vehicles or three-way catalytic converters for petrol vehicles, but the cleaning techniques are designed to be applied flexibly to the different types. For newer vehicles that have to meet strict emission requirements such as Euro 6, catalytic converter cleaning is also an effective way to optimise emission values and maintain efficiency.

If the catalytic converter is not cleaned regularly, deposits can build up and impair its function. A dirty catalytic converter leads to various problems:

• Worse emission values: The catalytic converter can no longer fully convert harmful gases such as NOx and CO, which increases emissions.
• Loss of power and higher fuel consumption: Because the exhaust flow is blocked, the engine has to work harder, which increases fuel consumption and reduces engine power.
• Costly repairs: If the catalytic converter is too heavily clogged and loses its function, this can strain the engine and other parts of the exhaust system and make expensive repairs or even a replacement necessary.
• Breaches of emission standards: Vehicles that do not meet emission standards can fail the periodic inspection and risk fines or driving bans.

Regular catalytic converter cleaning prevents these problems and helps maintain the function and efficiency of the exhaust system.

The duration depends on the method and how dirty the converter is, but it usually takes between 1 and 2 hours. The process includes the thorough removal of deposits and residues and a final check to make sure the catalytic converter works at its best.

Regular cleaning can help keep service intervals the same or even extend them. Because a cleaned catalytic converter works more efficiently, the exhaust system stays functional for longer and the load on the engine is reduced. For fleet operators and high-mileage vehicles, this means less downtime and potentially longer intervals between maintenance appointments.

Yes. At Advanpure GmbH we use an innovative thermodynamic cleaning process developed specifically for exhaust aftertreatment systems such as catalytic converters and particulate filters, which meets the highest cleaning standards. The process combines thermodynamic hot-air cleaning with wet cleaning, which ensures particularly thorough and gentle cleaning, even for heavily soiled filters.

Throughout the cleaning process, we continuously monitor back pressure and temperature. This ensures that the catalytic converter is not overloaded and the sensitive ceramic structure is not damaged. The wet cleaning at the start of the process uses special cleaning additives and the hydraulic effect of the water to loosen particularly stubborn deposits, which are then completely removed in the second step by thermodynamic hot-air cleaning. This process ensures maximum cleaning while protecting the material.

Our process allows controlled cleaning with minimal risk of damage, so the catalytic converter regains its full efficiency and can be used safely again.

A “full” or heavily soiled catalytic converter means that considerable deposits such as soot and unburnt hydrocarbons have built up. These residues restrict the exhaust flow and significantly reduce the efficiency of the catalytic converter.

• Short-term driving is possible, but risky: For a short time you can keep driving with a clogged catalytic converter. However, the increased exhaust back pressure puts strain on the engine, which can lead to a noticeable loss of power and higher fuel consumption. Driving for a longer period can cause overheating, as the exhaust flow is blocked and the temperature in the catalytic converter rises.
• Consequences of continued use: The longer you drive with a clogged catalytic converter, the more likely it is that the engine and exhaust system will be damaged. The blockage increases the exhaust back pressure on the engine, which can cause other parts such as seals, valves and the exhaust system to wear or fail prematurely.
• Recommendation: At the first signs of a clogged catalytic converter, such as loss of power, higher fuel consumption or an unusual exhaust smell, it is advisable to have it professionally cleaned to restore efficiency and avoid further damage.

A faulty catalytic converter has usually lost its ability to convert pollutants, so toxic exhaust gases such as carbon monoxide and nitrogen oxides escape into the environment unchecked. This is not only a problem for the environment and health, it can also have serious technical and legal consequences.

• Possible in the short term, but not advisable: You can drive a very short distance with a faulty catalytic converter, but only in an absolute emergency. A broken catalytic converter no longer does its job, and the exhaust flow is no longer properly treated. A faulty catalytic converter often causes very high exhaust back pressure, which can make the engine overheat and greatly shorten its service life.
• Legal consequences: In many countries, including Germany, driving with a faulty catalytic converter is prohibited because the vehicle no longer meets emission standards. Vehicles with increased emissions can be taken off the road during a roadside check and will fail the emissions test of the periodic inspection.
• Recommendation: A faulty catalytic converter should be replaced or repaired as soon as possible. Ignoring the problem risks not only high repair costs but also fines and driving bans.