2007 Infiniti g35x - limp mode
So I had a bad oxygen sensor and so I went to get it off with an oxygen sensor wrench and it wouldn't come off. It finally came of...with the nut that was welded to the catalytic converter. So I bought ebay catalytic converter and put it on along w new oxygen sensor but it still sounds like it has an exhaust leak. It's still sounding loud. And when I tried driving it, it was working OK at first but loud exhaust sound. Then it went into a limp mode and would hardly go 5mph. I barely got home. Have you heard of this limp mode before? What is solution to this problem? And could exhaust cause the limp mode?