2000 ford ranger stalling and shutting off while idling?

I have a quick question, last night I ran over a deer, the truck started stalling and would not pick up speed and accelerate Like it suppose to. The muffler was hanging and the oxygen sensor cable came unplugged, could that be the issue? Or any other ideas? The bottom looks solid nothing is damaged or bent, I did plug the oxygen sensor back, but no luck

Is the engine light still on?

Yeah, that would do it. Without the O2 sensor working the computer will not go into closed loop and will go into limp mode. The wiring may be damaged.

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