What are the reasons for the engine light icon to illuminate?
1 Answers
The main reasons for the engine light icon to illuminate are: 1. Fuel quality. The anti-knock property of gasoline is represented by the octane number. The higher the octane number, the better the anti-knock property. For example, 97-octane gasoline has an octane number of no less than 97. Leaded gasoline can cause lead poisoning in the oxygen sensor, making fuel quality a primary cause of insufficient engine combustion, which in turn triggers the engine fault light. 2. Poor engine combustion state. In automotive design, to ensure the engine operates in good condition and maintains a normal working lifespan, an oxygen sensor is installed to monitor the engine's combustion state. If the combustion state is poor, such as excessively high levels of hydrocarbons (HC), carbon monoxide (CO), or nitrogen oxides (NO), these indicate bad combustion states that not only pollute the environment but also lead to fuel waste and excessive engine wear. 3. Malfunctioning carbon canister solenoid valve. The solenoid valve receives ECU commands to control the air intake. If the solenoid valve is stuck in an open position, it causes the gas entering the intake pipe to become too rich, ultimately leading to an overly rich air-fuel mixture in the engine. This results in excessive exhaust emissions, prompting the oxygen sensor to send a feedback signal to the ECU, which then illuminates the engine fault light.
