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How to Deal with Exhaust System Malfunctions?

1 Answers

LeAlivia

07/25/25 4:00pm

The main cause of exhaust system malfunctions is damage to the oxygen sensor in the three-way catalytic system or poisoning of the three-way catalytic converter due to the quality of domestic fuel. Below are the methods to handle exhaust system malfunctions: 1. Repair at a service station: The exhaust system warning light in the engine often illuminates due to damage to the oxygen sensor in the three-way catalytic system or poisoning of the three-way catalytic converter caused by the quality of domestic fuel. If this light comes on while driving, it is necessary to immediately reduce speed and proceed to the nearest service station for inspection and repair. 2. Adjust the air-fuel ratio: Maintain the engine's air-fuel ratio within a narrow, near-ideal range (14.7:1). If the air-fuel ratio is too large, although the conversion rates of CO and HO slightly improve, the conversion rate of NO sharply drops to 20%. Therefore, achieving the optimal air-fuel ratio is crucial, and ensuring the oxygen sensor functions properly is key.

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