Hyundai XG350 intermittent stalling issue on Hyundai XG350

Some Hyundai XG350 owners report experiencing intermittent stalling issues due to several potential causes. Problems with the MAF sensor have been noted, which can lead to unexpected stalling; cleaning the MAF sensor and the butterfly valve may provide a temporary fix. Additionally, some owners have reported sudden engine power loss at highway speeds, often accompanied by vehicle shaking, which may indicate that one or two cylinders are not firing properly. Vehicles equipped with 2.4L or 3.5L engines may also experience unstable idle conditions, characterized by rough idling and possibly a check engine light, which could store code P0401 (EGR insufficient flow). Furthermore, a leak in the vacuum hose to the fuel pressure regulator can cause fuel starvation without triggering the check engine light. It is crucial for owners experiencing these symptoms to address these issues promptly to effectively diagnose and resolve the stalling problem.