TDI is shutting down

Hi,

For the past few days, I've been having a problem with my TDI.
direkt nach dem 'Anspringen' wieder ausgeht. Sure, here's the translation:

'Again.'
Just turn the key and the machine will run smoothly!

Am I not used to being treated by my 'BEST'?!

What could it be?

Olli.

Having issues with the immobilizer? Loose connection or something similar...?

Hello,

Which specific TDI engine are you referring to (engine code, model year)?

Hi,

Thank you for the answers!

It's a SEAT Leon TDI, manufactured in 2002, with an ASV engine producing 110 horsepower.
Current mileage: 15,000 km.

Is that enough?

CU
Olli.

Hello,

Does the immobilizer light illuminate when the engine is off?
Have you ever read the error memory of the engine control unit and the instrument cluster?