so yesterday I decided to change out the exhaust to the original straight pipe from the cat back that was on it cause the other one had a clear leak. I didn't think of it much so I turned the key and it just cranked and didn't start. The car has no prior issue at all. I don't even know what could cause so I'm going to the rabbit hole. I don't know if the battery could have been randomly depleted a bit and I will try jumping it in a bit. The only wires I touched were the o2 sensors. How is this even possible? Would appreciate any help.