What should you do when your check engine light comes on?

When your check engine light comes on, the first step is to check your vehicle's gas cap to ensure it is tightened properly, as a loose cap can trigger the light. If the light remains on, consult your vehicle’s manual and consider using an OBD-II scanner to read the error codes. If the issue seems serious or persists, it's best to take your car to a qualified mechanic for a thorough diagnosis and repair. Ignoring the check engine light could lead to more significant problems down the line.