Why does the engine light come on after an oil change?

[VanRhett]

It may be due to poor combustion conditions, as poor engine combustion is the main reason for the engine warning light to illuminate. Here is relevant information about engines: 1. Concept: An engine (Engine) is a machine capable of converting other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, internal combustion engines typically convert chemical energy into mechanical energy. 2. Classification: Internal combustion engines, external combustion engines, meaning the fuel burns outside the engine, gas turbines, and jet engines.