Your intentions were good, obviously, but he misunderstood. He may be a very private person - or just a grump. And he probably didn't make the connection in his mind between the noise and the absent car.
I wouldn't go out of my way to apologize to him. Your heart doesn't seem to be in it, and he may just take it as you "intruding" on his privacy again. Besides, you already explained your intentions. Either he gets it or he doesn't.
Maybe if you run into him you can apologize for this misunderstanding. But I don't think you should go to his house to do it.
Also, in the future, I wouldn't concern myself with his home or his wellbeing, unless something clearly bad is happening right in front of you. Imo, you should look out for your other neighbors, as ever, but not so much for him unless he says sorry for his rude reaction. Either he had an "off" day or he just doesn't appreciate it.