What is the reason for the yellow engine light on the Haval H9?
1 Answers
Haval H9 engine yellow light may be caused by the following reasons: Reasons why the engine fault light is yellow but the car can still run normally: Fuel supply system problems: The fuel supply system mainly includes the fuel tank, fuel pump, pipelines, fuel filter, carbon canister, carbon canister solenoid valve, fuel pressure regulator, fuel injectors, etc. Poor fuel quality: Fuel quality is the primary factor causing the engine fault light to illuminate. The anti-knock performance of gasoline is represented by the octane number. The higher the octane number, the better the anti-knock performance. For example, 97-octane gasoline has an octane number of not less than 97. Leaded gasoline can cause oxygen sensor lead poisoning, so fuel quality is the main reason for insufficient engine combustion, leading to the engine fault light illuminating. Abnormal fuel pressure: If the fuel pump's supply pressure does not reach a certain level, it will result in poor atomization of the fuel injectors, thereby affecting the normal operation of the engine. Poor combustion state: A poor engine combustion state is the main reason for the engine fault light to illuminate. In automotive design, to ensure the engine is in good working condition and to guarantee its normal working lifespan, an oxygen sensor is installed on the engine to monitor the combustion state. Once the engine combustion state is poor, it not only pollutes the environment but also causes fuel waste and excessive engine wear.
