Guess what? The engine light comes on again.

Not unexpected. Well, not by me. The downloaded diagnostics. noticed some errors readings on the catalytic converter. So they did a reset and added some special liquid to the fuel to "clean out" the converter.

Which of course didn't help. The light came on again after some healthy but not extreme acceleration. I often go over 5000 rpm while accelerating. (Over 6000 when I push it, redline is at 6500 but power drops noticeable then ) They did "test drive" but I suppose they didn't do that sporty.

One advantage. I just got my invitation for the official independent inspection (after 4y, next after 6y then after 8y and yearly) So I am going to propose they drive it to the inspection, have that done and then race it a bit while driving home. See if they find out something then.