Fiat 500 drive mode intermittently unavailable and engine jerks at traffic lights on Fiat 500

Some Fiat 500 owners report experiencing issues such as the drive mode being intermittently unavailable, which may be linked to software or sensor problems. Additionally, some owners have noted engine jerking at traffic lights, potentially caused by automatic transmission system issues. To address these concerns, it is recommended that owners have their vehicles inspected by a certified Fiat technician for accurate diagnosis. Updating the vehicle's software may also help resolve any software-related problems affecting the drive mode. Furthermore, consulting a professional about the use of a TMC Autoflash device could assist in alleviating the jerking issue during shifting.