The catalytic converter is used 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 has an oxygen content sensor that sends a signal to the electronic module. The latter constantly changes the fuel/air ratio within narrow limits to reduce harmful emissions.
When working under the car, remember that the catalyst cools down more slowly after the engine is stopped and 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 catalyst.
If unburned fuel enters the catalytic converter, it can burn there, causing 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) prolonged starter engagement (fuel injected during start);
- c) cases when there is almost no fuel in the fuel tank (irregular fuel supply can cause overheating);
- d) engine start by towing (unburned fuel can enter the converter).
To avoid catalytic converter damage, regular engine maintenance should be performed and ALWAYS use unleaded gasoline.
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