What is cel in cars?

A cel (check engine light) is a warning light that appears on the instrument panel of a car and is designed to alert the driver of a potential problem with the vehicle's engine or emissions system. The check engine light can be triggered by a wide range of issues, including faulty sensors, a damaged catalytic converter, or a malfunctioning oxygen sensor. When the check engine light comes on, it is important to have the car diagnosed by a professional mechanic. Ignoring the warning light can lead to serious problems, such as engine damage or reduced fuel efficiency.