What the carmd code p0303 mean?

The diagnostic trouble code (DTC) P0303 indicates a "Cylinder 3 Misfire Detected." This means that the engine's control module has detected that cylinder number 3 is not firing properly, which can lead to poor engine performance, increased emissions, and reduced fuel efficiency. Common causes for this code include faulty spark plugs, ignition coils, fuel injectors, or issues with the engine's compression. It's essential to diagnose and address the underlying issue to prevent further engine damage.