What is the reason for the fault light on the Lavida car when the bulb is not broken?

[VivienneLee]

Lavida car bulb is not broken but the fault light is on for the following reasons: 1. Abnormal engine oxygen sensor. The engine oxygen sensor is usually placed near the intake manifold. Due to aggressive driving or some collision situations, the oxygen sensor may be displaced or damaged, which will cause the sensor to malfunction and trigger the fault light alarm. 2. Clogged fuel injector and carbon buildup on the intake valve. Since gasoline contains impurities, accumulation at the fuel injector will affect the fuel injection, especially in direct injection engines, which can directly cause the engine to shut down. After combustion, these impurities will produce carbon deposits. When accumulated to a certain extent on the throttle valve, it will affect the normal opening and closing of the throttle valve, disrupt the normal operation of the engine, and cause the warning light to come on.