The check engine light is a critical warning signal that shouldn't be ignored. Whether it's a loose gas cap or a serious engine issue, the check engine light alerts you to potential problems in your vehicle. If your check engine light is flashing or staying on, it's important to get it diagnosed promptly to avoid costly repairs. Modern cars use this system to monitor engine performance, emissions, and more. Ignoring the check engine light can lead to bigger issues down the road. Visit a trusted mechanic to identify the problem and keep your car running smoothly and safely.