What are the reasons why the Nissan Sylphy won't start?

[EthanLee]

Nissan Sylphy won't start may be caused by reasons such as poor-quality gasoline, faulty oxygen sensor, spark plug carbon buildup, etc. Poor-quality gasoline: Filling up with low-quality gasoline at non-standard gas stations can result in incomplete combustion of the air-fuel mixture during engine operation, causing the engine fault light to illuminate. This does not affect driving safety but may harm the engine to some extent. Faulty oxygen sensor: If the oxygen sensor is damaged or the sensor connector is damaged or loose, it can cause the air-fuel mixture to be too lean or too rich, leading to the fault light coming on. Spark plug carbon buildup: Spark plug carbon buildup can lead to poor engine performance, manifesting as difficulty starting, unstable idling, poor acceleration, backfiring during sudden acceleration, excessive exhaust emissions, increased fuel consumption, and other abnormal phenomena.