What causes the Audi Q5L to stall automatically?

[StBrynlee]

The reasons for a car stalling automatically after starting include severe carbon buildup in the engine, the car's anti-theft system, ignition switch failure, and low fuel system pressure. Severe carbon buildup in the car engine: If there is severe carbon buildup in the car engine and fuel cannot burn effectively in the cylinders, the vehicle may stall after starting. In this case, the carbon buildup in the engine should be cleaned promptly. Triggering the car's anti-theft system: If the car's anti-theft system is triggered, the engine may start but fail to operate normally, causing the vehicle to stall automatically after starting. This situation commonly occurs after replacing the car key or its battery, so it's essential to recode the key after such replacements.