Hyundai Elantra engine shaking with persistent check engine light issue on Hyundai Elantra

Some Hyundai Elantra owners report experiencing engine shaking accompanied by a persistent check engine light. These issues may stem from various factors, including problems with fuel injectors, which can lead to both symptoms. Additionally, worn or damaged motor mounts have been identified as potential culprits for the shaking. Specific engine codes, such as P0301, may indicate issues with a particular cylinder, further contributing to the engine's instability. Some owners have found that a faulty valve within a cylinder can also result in poor performance and a blinking check engine light. Furthermore, a malfunctioning Engine Control Module (ECM) or Engine Control Unit (ECU) can adversely affect engine performance and trigger warning lights. An Exhaust Gas Recirculation (EGR) system malfunction is another possible cause of these issues. Lastly, a failing gas cap gasket can lead to gas vapor release, causing an uneven fuel mixture and engine wobbling. Addressing these concerns promptly is essential for maintaining the performance and safety of the Hyundai Elantra.