What is a cel in a car?

A car's cel (check engine light) is part of the onboard diagnostics system that monitors various components of the vehicle for malfunctions or issues. When the cel illuminates on the dashboard, it indicates that there is a problem with the engine, emissions system, or other critical components.

The cel is typically a yellow or orange icon shaped like an engine, and it should not be ignored as it can signal issues that may affect the performance, efficiency, and safety of the vehicle. When the light comes on, it is recommended to have the vehicle diagnosed by a professional mechanic or at an auto repair shop to determine the exact cause of the problem.

Common reasons for the cel to illuminate include issues with the oxygen sensor, catalytic converter, spark plugs, or fuel injector. Ignoring the check engine light can lead to further damage to the vehicle and potentially more costly repairs in the future. Regular maintenance and prompt attention to warning lights are essential for keeping a car running smoothly and efficiently.