Why does BMW automatically shut off when parked?

[Mandy]

BMW automatically shuts off when parked due to reasons such as low engine temperature or fuel pump malfunction. The details are as follows: Low engine temperature: Fuel is less volatile and harder to vaporize. If there is severe carbon buildup in the fuel lines, intake passages, etc., these carbon deposits will absorb some fuel vapor, leading to an overly lean air-fuel mixture entering the cylinders for combustion. This can cause unstable idling or immediate stalling after ignition. If you attempt ignition multiple times, the carbon deposits will become saturated with fuel vapor, allowing the air-fuel mixture entering the cylinders to meet the standard, and the engine can start. Fuel pump malfunction: The fuel pump may suddenly jam or experience other faults, causing it to rotate insufficiently or stop altogether, resulting in insufficient fuel supply and stalling. Low fuel system pressure, such as weak fuel pump pressure, fuel line leaks, insufficient electrical current, or a damaged fuel pressure regulator, can also lead to inadequate fuel supply. Clogged or leaking fuel injectors can cause poor atomization, resulting in insufficient fuel supply and stalling.