What to Do If the Vehicle Fails to Meet Emission Standards?

1 Answers
VanMaria
07/30/25 8:11am
Here are the relevant solutions: 1. Clean or replace the spark plugs. The spark plug is the heart of the engine and also a consumable item. When it ages or is damaged, it can lead to insufficient ignition capability, preventing the complete combustion of the air-fuel mixture, resulting in excessive HC content in the exhaust. Daily maintenance of spark plugs can restore their activity through sandpaper or cleaning agents, but if severely aged, they need to be replaced. 2. Clean or replace the three-way catalytic converter and oxygen sensor. During vehicle operation, carbon deposits often form due to incomplete combustion of the engine's air-fuel mixture. These deposits can adhere to the interior of the three-way catalytic converter and the surface of the oxygen sensor, causing blockages and leading to excessive exhaust emissions. 3. Perform a deep cleaning of the engine. Owners should visit a 4S shop or auto repair shop to clean the engine's carbon deposits. After thoroughly cleaning the throttle body, fuel lines, intake ducts, and fuel injectors, the engine's operating conditions will improve significantly, avoiding excessive exhaust emissions caused by incomplete combustion of the air-fuel mixture under poor operating conditions.
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