P1131 and P1151 Code. Is it bad to drive with these codes thrown

[MustangLife]

I got a major exhaust leak coming from the passsenger side exhaust manifold. I think at the x-pipe to manifold connection. So in return these codes were thrown within 24 hours of the noticeable sound. My car is already leaned out from a SCT tune. So is it bad bad to drive for a few days like this. Its just cold and not the easiest exhaust leak to fix. (I'm praying to god the leak is not at the manifold to block)

Thanks
Josh