It might be easier to use the last solution offered by the wiki:
It should have the same effect as the AR Code, but it'll also disable some other graphical effects. It's a quick work-around that won't have you looking for a code that might not exist. Also about the Free Look, you're not supposed to zoom in too much, just enough to where the heat effect disappears. Haven't tried this myself, but I imagine you should be able to find a good middle-ground if you play with it.
Quote:Checking EFB Copies - Disable before running the game will disable the heat effect entirely, and prevent the problem from occuring. Remember to disable it before running the game, otherwise the visuals will become stuck. Disabling EFB Copies also disables several other effects used throughout the game, so it is not recommended.
It should have the same effect as the AR Code, but it'll also disable some other graphical effects. It's a quick work-around that won't have you looking for a code that might not exist. Also about the Free Look, you're not supposed to zoom in too much, just enough to where the heat effect disappears. Haven't tried this myself, but I imagine you should be able to find a good middle-ground if you play with it.