Problem with the Lambda display after empty drive…

Hello guys, I accidentally drove my elch empty, ok, okay, not well, but sometimes it’s only on the last pusher since I always try to fill up under 1,50., sometimes gets scarce 🙂 anyway since the Lambda lights up constantly during the ride, was not before, and He starts irregularly, sometimes quite normal, sometimes bad, and sometimes not at all 🙂 But if He runs then He runs without a problem! someone’s idea what that could be!? before He ran without any problems… I suspect that the memory would have to be deleted, but I have too little idea… anyway I hope to get around the workshop… I am grateful for every tip!!!