An engine misfire occurs when one or more cylinders in a vehicle's engine fail to ignite the air-fuel mixture properly. This can lead to a loss of power, rough idling, and increased emissions. Common causes include faulty spark plugs, fuel delivery issues, or problems with the ignition system. When an engine misfire happens, it can trigger the check engine light on the dashboard, alerting the driver to a potential issue. Ignoring a misfire can lead to more serious engine damage and decreased fuel efficiency. Regular maintenance can help prevent misfires and keep the engine running smoothly.