I will agree with that, for some reason it skipped my mind and last night I got under the car as it was running. The front passenger side exhaust to the cat was glowing red hot at the neck as it goes into the cat. After running I tried tapping it with a rubber mallet but don’t hear any raddle like I am used to in a bad cat. Also can I just replace this one cat or to I have to do all 4 or both front ones? Is there a way to test the cam sensor too?