Catalytic Converter — General Information (Opel Astra F)

All fuel-injected models have a catalytic converter to reduce emissions of harmful substances with exhaust gases. It is located in the exhaust system between the front and center sections.

The catalytic converter serves to convert carbon monoxide CO, nitrogen oxide and unburned hydrocarbon compounds into harmless gases and water vapor before being released into the atmosphere. The catalytic coating includes precious metals: platinum, palladium and rhodium.

The control system includes an oxygen sensor that sends a signal to the electronic module, which constantly changes the fuel/air ratio within narrow limits to reduce harmful emissions.

When working under a vehicle, remember that the catalytic converter cools down more slowly after the engine has been stopped and safety precautions must be taken.

If you suspect a malfunction of the ignition system, you must immediately find out the cause, since malfunctions, especially in the ignition system, can cause damage to the catalytic converter.

If unburned fuel gets into the catalytic converter, it can burn there, which will lead to overheating and damage to the converter. To avoid this, you should try to exclude:

• a) frequent starting of a cold engine several times in a row:
• b) long-term starter activation (fuel is injected during startup);
• c) cases when there is almost no fuel in the fuel tank (irregular fuel supply can cause overheating);
• d) starting the engine by towing (unburned fuel can get into the neutralizer).

To avoid damage to the catalytic converter, it is important to perform regular engine maintenance and ALWAYS use unleaded gasoline.