Peugeot 806 Catalytic Converter (1994-2002)

The catalytic converter is a crucial part of the exhaust system that transforms harmful gases into less dangerous emissions through a chemical catalytic process. Exhaust gases entering the catalytic converter are filtered and chemically transformed to reduce pollution from the vehicle’s engine.

The catalytic converter must reach a temperature higher than 400 degrees Celsius to work optimally. During cold starts or short trips, the catalytic converter may not be fully effective since it has not reached its ideal operating temperature yet.

The converter contains microparticles of precious metals such as platinum, palladium, and rhodium. These metals are essential for effective catalytic reactions and impact the price and value of the catalytic converter.

The catalytic converter performs different reactions depending on the engine type:

• Gasoline engines: Convert nitrogen oxides into carbon dioxide, carbon monoxide into carbon dioxide, and unburnt hydrocarbons into water vapor and carbon dioxide.
• Diesel engines: Convert carbon monoxide into carbon dioxide and unburnt hydrocarbons into water vapor and carbon dioxide. Note that carbon dioxide is further transformed by the DPF, not the catalytic converter.

This ensures pollutants are significantly reduced before being released into the atmosphere.

Modern Peugeot 806 vehicles typically have two catalytic converters:

• Pre-catalytic converter: Positioned between the exhaust manifold and the main exhaust line, it pre-filters the gases.
• Main catalytic converter: Completes the transformation of exhaust pollutants fully.

This two-stage system enhances overall pollutant reduction performance.

Symptoms of a defective catalytic converter include:

• Engine warning light illumination on the dashboard
• Noticeable loss of engine power
• Increased fuel consumption
• Potential release of ceramic fragments into the exhaust line
• Incorrect exhaust backpressure sensor readings due to partial clogging

If these signs appear, the catalytic converter’s condition should be checked promptly to avoid further engine or emissions system damage.

The price of a Peugeot 806 catalytic converter varies widely depending on manufacturer and model, ranging from approximately 39 to 526 euros. Approved and original quality catalytic converters are available for online order with detailed references and recommendations for the correct fitment to your Peugeot 806 model. Many suppliers offer warranties and professional-grade products adhering to strict European environmental standards.

Replacing the catalytic converter is a complex procedure that requires mechanical skills. Illustrated manuals and step-by-step video tutorials are available to assist DIY enthusiasts. However, professional installation is recommended for ensuring proper fit, sensor calibration, and compliance with emission regulations.

Proper maintenance also involves:

• Ensuring the engine runs on unleaded petrol only
• Replacing the Lambda sensor simultaneously after 80,000 to 100,000 km
• Using copper connections if installing exhaust pipes before the catalytic converter
• Regular engine servicing and avoiding short trips that prevent the catalytic converter from reaching its operating temperature

Following these guidelines helps maintain the performance and lifespan of your Peugeot 806 catalytic converter.