Cool Faulty Check Engine Light 2023. Web the check engine light (cel) is a dashboard warning light that shows up when your car’s computer (engine control unit) senses a problem with the engine or emission control system. A failed spark plug or ignition coil.
Web the most common reason behind the check engine light flashing is an engine misfire. The mass air flow sensor signals the ecu about the amount of air coming through to the engine, so the right amount of fuel can also be used. An illuminated check engine light is one possible symptom of a problem with the ecm.
