I had a misfire in cylinder 5 so I changed the spark plugs and the fuel injector for that cylinder. That code went away now I have P0174 which means bank 2 is running too lean. From what I gather I have a leak most likely but not sure where to start or what to check exactly. It idles rough now and also seems to be burning more fuel as far as symptoms go. Curious to know what your suggestions are! Thanks.

 

Misfires cause Lean codes
So P0305 would cause P0174

If you think the misfire is gone, fixed by new spark plugs, then wait to see if P0174 goes away or other bank also gets Lean code

Leans codes do not mean engine is running lean, it means computers calculation was lean, it can not cause any running issues

 

I understand the misfire code caused the lean but now the misfire code is gone and just the lean code is there. It idles rough and shakes so I think it’s still misfiring from what I’ve read. I changed the fuel injector where it said had the misfire which was number 5. Also bought a new intake manifold gasket and fuel filter I’m going to change, probably do the other 2 injectors as well just to be sure. Could it be because I didn’t put the injector back correctly or the others?