Lupo 3L – Power steering / steering aid is sporadic

Hi guys, I occasionally miss the power steering (on average 2 to 3 times a month, sometimes for a long time nothing again relatively often). This does not happen while driving, but when starting the engine. Not when the car was long, but when it only stood for a few minutes and then I start again. The failure is not temperature dependent, a restart does not help. Error code read out: 00570 – Relay for steering motor (J509) / 35-10 — Sporadic 00569 – Power steering motor / 27- 10 – unplausible signal – Sporadic As I have read here in the forum, I have already pressed the relays onto the relay carrier. However, these were not loose and today the same problem occurred again. Does anyone have a suggestion as to how to continue? Replace relays? Thank you for your answer. Greetings, Dominik