hope not, at this point its unlikely he'll coach another club after city but he can be fired in the meantime. no coach is immune to that, from what the man himself said he likes it at city, working with his old pal txiki, he likes the english game atmosphere and not being under intense outside pressure like at bayern and barcelona.
edit: Also, realistically, while you might agree with it or not, in most big clubs he'd be under fire after losing that lyon game and probably heading out. That was a big mess he made, i dont recall him having such a bad game in his career