Ford Ka Catalytic Converter

The Ford Ka catalytic converter is a crucial part of the vehicle's exhaust system that filters harmful pollutants from exhaust gases. It chemically converts toxic gases into carbon dioxide and water, helping to reduce the vehicle's emissions and protect the environment.

The catalytic converter in the Ford Ka features a specific structure including:

• A ceramic core shaped like a honeycomb with multiple small channels for exhaust gases to flow through
• A catalytic layer made of a special alloy of platinum and iridium coated on the core
• A thermal stainless steel shell made of two parts with an elastic intermediate layer to handle temperature expansion
• Multiple monoliths inside to manage thermal variations effectively

This design maximizes efficiency and durability of the catalytic converter under high operational temperatures.

The purification process involves two main chemical reactions:

• Reduction Catalysis: Reduces nitrogen oxides (NOx) using rhodium or platinum
• Oxidation Catalysis: Burns hydrocarbons and carbon monoxide (CO) with platinum and palladium

Exhaust gases flow through the small porous structure of the honeycomb, increasing contact with precious metals and transforming harmful molecules into less dangerous elements.

The catalytic converter requires a specific temperature to function effectively. The ideal operating temperature is around 420°C. It is positioned close to the engine to reach this temperature quickly. If the temperature is too low, the converter can clog and lose efficiency.

The system uses two oxygen sensors (lambda probes):

• One sensor before the catalytic converter to measure gases pre-treatment
• One sensor after the catalytic converter to measure gases post-treatment for efficiency verification

These sensors help control the air-fuel mixture for optimal catalytic conversion. If issues arise, the engine's control unit triggers a “Check Engine” light and stores error codes for diagnosis.

Common reasons for failure include:

• Malfunctioning air-fuel mixture system
• Engine problems that generate abnormal exhaust gases
• Clogging due to insufficient operating temperature
• Natural wear related to vehicle age and mileage

Regular maintenance and engine checks can help avoid premature failure.

Replacement involves:

• Welding a new catalytic converter unit into the exhaust system, replacing only the converter itself
• The main exhaust pipe remains intact
• After replacement, the vehicle’s ECU must be reflashed or a special chip installed on the second oxygen sensor to ensure proper operation according to regulation R2

Free repair guides and step-by-step videos are available to assist in replacement and related repairs such as exhaust manifold or DPF changes.

Please observe the following precautions:

• The exhaust system remains very hot during operation and even long after the engine is switched off
• Do not park or let the engine idle over dry leaves, dry grass, or any flammable materials

Always handle the exhaust system with care and allow it to cool properly before maintenance.

For any product enquiries, fitting guidance, or to check compatibility, contact Krosfou for expert support and access to genuine, high-quality catalytic converters designed for your Ford Ka model.