Probs with immobiliser

Moin together, bought a Clio II 1.2 16V (BJ 2001) for my wife 2 months ago.It was not cheap, but according to the previous owner everything that could go defective in the last two years was changed or renewed. After 3 days warning lamp for electronics went on for the first time.( later read out P0136 /P0790 ) After 7 days the ZV found to spin.She went …..then not again. Shortly afterwards the Wfs did not always go . One always needed 2-3 try until the Mo (Blinked fast) So it went a few weeks until Monday I had to call the yellow angels because the car didn’t sprung at all. (Wfs glowed continuously) ZV went at once wonderful again. The ADAC man then emptied out the error memory, there were only the two above mentioned errors in there and nothing of WFS or anything else. He also meant that it was not because of the WFS because the would be from .HMMMM?? Well, he didn’t have that view. Garage.Looked at one or the other fuse and just got a transponder ring from the Schrotti for tens. But of course did not do anything and I don’t know any more. Is there anything else you could check out? I am grateful for every tip.