brief history of the car, bought in 2014 GT, installed a vortech centri at 9k miles and had that and roush mufflers and a local tune, removed the SC after 4k miles due to moving to new location (military) and flashed back to factory tune with only a airaid intake tube and roush mufflers as only mods, drove the car 3400 miles across the country and been at my new location for about 2 weeks, now currently at 19k miles and just popped a P0420 cat code. i looked it up but it seems like most answers are about either getting this code after cat removal/exhaust mods or needing it tuned out. thing is the car is back on factory tune so that isnt it and the muffler swap 2 years ago certainly didnt cause this. The car seems to drive fine but i have noticed a ticking noise coming from the passenger side engine bay that (at least to me) has grown louder after the 3400 mile trip. I never noticed the ticking until after the last oil change just before the trip, did research and most people admit to a tick and that its no issue as these modulars are noisy.
any other ideas as to the cause of the P0420? could my brief supercharged time burnt up a cat a bit? or is this pointing to more of an exhaust leak but on 100% stock manifolds? intake mani was also never removed since it was a centrifugal install.
any other ideas as to the cause of the P0420? could my brief supercharged time burnt up a cat a bit? or is this pointing to more of an exhaust leak but on 100% stock manifolds? intake mani was also never removed since it was a centrifugal install.
