I have a mach but its basically the same thing and I need help ASAP. Hope you don't mind 
So a week ago I installed a magnaflow catted x pipe. In the process I crossthreaded a stud on the driver side. I drove around for a few days with only 1 stud bolted down and it leaked pretty bad, but no CEL. Had Meineke replace the stud and tighten everything down. Still leaks bad and the same day I had it fixed I got the code for a bad cat on the driver side and lean condition bank 2 (p0174). Reset my ECU and after 30 miles today I got new codes. Lean condition bank 2 once again along with missfire cylinder 6 (p0306) and "crank sensor condition" (p0316).
I know the exhaust leak is 99% most likely the cause of the lean condition codes, but would it be the source of my two new ones as well?
So a week ago I installed a magnaflow catted x pipe. In the process I crossthreaded a stud on the driver side. I drove around for a few days with only 1 stud bolted down and it leaked pretty bad, but no CEL. Had Meineke replace the stud and tighten everything down. Still leaks bad and the same day I had it fixed I got the code for a bad cat on the driver side and lean condition bank 2 (p0174). Reset my ECU and after 30 miles today I got new codes. Lean condition bank 2 once again along with missfire cylinder 6 (p0306) and "crank sensor condition" (p0316).
I know the exhaust leak is 99% most likely the cause of the lean condition codes, but would it be the source of my two new ones as well?
