Honda Jazz Catalytic Converter

The catalytic converter in a Honda Jazz is a crucial exhaust system component designed to reduce harmful emissions such as carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx). It achieves this through chemical reactions at high temperatures (around 420°C), utilizing precious metals like platinum, palladium, and rhodium on a ceramic honeycomb structure to convert toxic gases into less harmful substances like carbon dioxide (CO₂), water (H₂O), and nitrogen (N₂).

On the Honda Jazz, the catalytic converter is positioned near the engine, often in a "close-coupled" setup to heat up quickly and function efficiently. It is monitored by oxygen sensors — one before and one after the catalytic converter — to ensure proper operation and emission control.

Common signs of catalytic converter problems in the Honda Jazz include:

• Check engine light with error code P0420 indicating low catalytic converter efficiency.
• Loss of engine power, poor acceleration, or noticeable surges and hesitations.
• Increased fuel consumption and engine misfires.
• Unusual smoke or dark exhaust fumes and rattling noises under the vehicle.

These symptoms often indicate the catalytic converter is clogged, damaged, or otherwise malfunctioning.

Diagnosis involves checking the oxygen sensors:

• The front oxygen sensor voltage fluctuates between 0-1V while the engine runs normally.
• The rear oxygen sensor should show a stable voltage around 0.88V if the catalytic converter is working efficiently.

Detection of unusual readings, especially a consistently high voltage in the rear sensor, often triggers the P0420 code. Additional inspection for exhaust leaks, blockages, or damages may be necessary by a professional.

Replacing the catalytic converter typically follows these steps:

• Scan and clear error codes, such as P0420.
• Disconnect the oxygen sensors: the front sensor is accessible under the hood, the rear sensor may require removal of interior panels like the console and floor grommets.
• Unbolt and remove the old catalytic converter using appropriate tools.
• Install the new catalytic converter with compatible parts, ensuring no damage to sensor wiring by carefully handling sensors.
• Reconnect sensors, mount all components, and perform road testing to verify sensor voltages and proper operation.

Professional tools such as an OBD scanner and specific wrenches are recommended for this procedure.

While aftermarket catalytic converters are available, it is essential to ensure they comply with manufacturer specifications and European emission regulations. Certified products feature high-quality ceramics and precious metal coatings that guarantee performance and durability, similar to original parts. Using certified quality parts helps maintain emission control, engine function, and legal compliance.

Krosfou offers brand-new, high-performance catalytic converters manufactured in Europe with a 3-year warranty and TÜV SÜD certification, ensuring quality and reliability.

Krosfou catalytic converters come with a 3-year warranty limited to 100,000 kilometers of use. The lifespan depends on proper vehicle maintenance and driving conditions — including avoiding short trips that prevent the engine from reaching optimal temperatures. Adherence to manufacturer fitting instructions and replacement of related components like oxygen sensors and spark plugs extends catalytic converter life.

Maintaining the catalytic converter involves:

• Regularly replacing spark plugs and ensuring proper engine tuning to avoid poor combustion.
• Driving the vehicle sufficiently long to reach and maintain operating temperatures, allowing the catalytic converter to function effectively and burn off deposits.
• Replacing faulty oxygen sensors promptly to prevent incorrect air-fuel mixture and avoid damaging the catalytic converter.
• Avoiding fuel contamination and ensuring the car runs on unleaded petrol as originally designed.

Proper maintenance helps preserve the catalytic converter's efficiency, save fuel, and reduce harmful emissions.