Starting problems

Hello fellow diesel enthusiasts, I'm having the following problem with my A4 1.9 TDI: When I start it, it stalls 2 or 3 times. It runs briefly, but then immediately stalls. I would appreciate it if someone could help me. Best regards, Maxx.

Hi.

If the engine starts normally, runs for about 1 second, and then shuts off again, that's a typical symptom of a blocked immobilizer system.
It can have several causes: the reading coil in the ignition switch may be defective or loose, the transponder in the key may be faulty, or metal objects near the key may interfere with the reading process (e.g., a bulky keychain).