Warning: Exhaust system components can reach very high temperatures - avoid touching hot parts and do not park the vehicle on areas covered with flammable materials (fallen leaves, dry grass, garbage, etc.)!
Attention: Do not use leaded gasoline for refueling a vehicle equipped with a catalytic converter on gasoline models - the lead contained in it in high concentrations is deposited on the surfaces of the converter's working element, significantly reducing its operating efficiency and service life!
Catalytic converter (see illustration 28.1) is a highly effective element of the exhaust gas toxicity reduction system and is included in the exhaust system. Inside the ceramic working element, oxidation/conversion of exhaust gases occurs at high temperature in order to reduce the level of toxic components in them (for more details see Chapter 4).
28.1. Main design elements of the catalytic converter: 1. Body; 2. Working element; 3. Insulating seal
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When starting a cold engine on models with the corresponding AT/Easytronic configuration (in automatic mode) shift to a higher gear at higher revs - this ensures rapid heating of the catalyst to its optimum operating temperature.
Ensure that the engine settings and adjustments are correct. Deviations in the setting of operating parameters of the ignition, fuel injection and engine management systems can lead to a dangerous over-enrichment of the air-fuel mixture, leading to the inevitable overheating of the catalytic converter. If misfires occur, the operation of the car should be suspended until the causes of the malfunction are eliminated, since fuel that does not burn in the cylinders invariably gets into the converter, where it can easily ignite (for the same reason, starting the engine by towing or pushing should be avoided). Do not forget to also monitor fuel consumption, not allowing it to run out completely, which is usually associated with the occurrence of misfires.
When driving in forced idle mode (for example, when descending or braking) the fuel supply is automatically switched off if the gas or clutch pedal is not depressed. But at high catalyst temperatures, this mode is deactivated to protect it from damage. If a malfunction occurs in the engine management system, the corresponding indicator lamp lights up on the instrument cluster (see Section 16) - follow the recommendations given.
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