i recently had to have 2 fuel injectors replaced, and the truck ran great, then I got an o2 sensor code. I was told that it was a leak in the exhaust before the cat. I had leak fixed. now I'm getting a bank2 02 sensor code as well as a cat code, and it is ideling a little rough, and when you get up around 65 there is a shaking that you can feel in the gas peddle. could this be from a clogged cat.