Mini Cooper cranks but does not start after battery replacement, error code P15E8 on Mini Cooper

Some Mini Cooper owners report experiencing starting issues after a battery replacement, particularly when encountering error code P15E8. These problems may stem from several factors, including insufficient battery voltage affecting ignition coils and the overall starting process. Additionally, a weak or dead 12v battery can result in the engine cranking slowly or not at all. Some owners have noted a humming sound when attempting to start, which could indicate a starter or ignition problem, potentially linked to the battery. Furthermore, blockages in the air filter or housing may hinder the engine's airflow, complicating the starting issue. It is also recommended to perform a spark test to ensure the ignition system is functioning properly. To effectively troubleshoot these concerns, owners should examine the battery, ignition system, and any possible blockages.