On a 2000 ford ranger, will driving it without a catalytic converter cause valve issues?

My ford ranger has had the cat removed (not by me!) and it is causing an O2 sensor code, of course, and an overly rich exhaust and poor fuel milage. Now, I know it needs fixed and I will when I get the time to get it to a muffler shop, but my question is, will driving it for a little while right now cause any valve trouble or any damage elsewhere?

A missing downstream 02 sensor would never be the cause of a rich mixture. Only the upstream sensor controls air/fuel mixture

It will damage the O2 sensor but nothing else.

Should be fine

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