Audi A3 2.0T cranks but does not start, no spark or injector pulse after key loss and safe mode issue on Audi A3

Some Audi A3 2.0T owners report experiencing issues where the vehicle cranks but does not start, often accompanied by a lack of spark and injector pulse following a key loss incident and safe mode activation. These problems may stem from battery issues, as a weak battery can prevent adequate power from reaching the starter motor. Additionally, owners may encounter electrical problems, such as blown fuses, particularly the fuel pump fuse, which can hinder fuel pump operation. Mechanical issues related to spark, fuel, compression, or timing may also contribute to the starting failure, with extended cranking potentially leading to false fault codes. Furthermore, sensor malfunctions, indicated by voltage readings from diagnostic scans, can impact the starting process. To effectively diagnose and resolve these issues, a thorough check of the battery, fuses, sensors, and any mechanical components is recommended.