What are the solutions when the engine malfunction indicator light suddenly comes on?

[JoelAnn]

The solutions when the engine malfunction indicator light suddenly comes on are: 1. Check the working condition of spark plugs and cylinder wires; 2. Perform fuel pressure system inspection; 3. Inspect each cylinder's fuel injector; 4. Examine the fuel pump and fuel pump circuit; 5. Check cylinder pressure, exhaust valve clearance, fuel vapor control solenoid valve, EGR valve cylinder body operation, and intake manifold for leaks. The reasons why the engine malfunction indicator light suddenly illuminates include: 1. Poor gasoline quality leading to incomplete combustion of the air-fuel mixture in the cylinder, resulting in carbon deposits; 2. Excessive engine mileage causing weakened spark plug performance; 3. Mechanical aging of the vehicle; 4. Damage, poor contact, or signal interruption of components such as coolant temperature sensor, crankshaft position sensor, air flow sensor, intake air temperature sensor, and oxygen sensor.