Land Rover LR2 inspection failure due to engine misfire code after ECU replacement on Land Rover LR2

Some Land Rover LR2 owners report experiencing engine misfire issues following an ECU replacement, often indicated by code P0302, which signifies a misfire in cylinder 2. Common causes for this misfire include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, and low compression, all of which can lead to power loss, rough idling, and potential engine damage if not addressed promptly. Owners have noted that clearing faults and monitoring which codes reappear can help identify the root cause, as electrical faults may trigger unrelated error codes. Additionally, some owners find that a single worn or leaking fuel injector can lead to multiple misfire codes due to variations in fuel rail pressure. Therefore, it is essential for LR2 owners to thoroughly inspect and potentially replace spark plugs, ignition coils, and fuel injectors, as well as check for vacuum leaks or low compression to effectively resolve these issues.