P1E05 error code diagnostic bmw e39 530 D

Hy,can someone please help me.on diagnostics it says error code P1E05 .

My car is bmw e39 530 D touring,2000 year, ASC

What to do?

Sometimes it just shuts down.

Please help,what to look,on this error code they said its under the seat ,its known like "speed sensor"

Its not under the seat!!!!

Thank youuu