Notifications
Clear all
0
12/11/2021 7:30 am
Topic starter
Hello guys back with another 1 for my wife's car she came to me saying her check engine light on so I scan it with my tool and it reads the dreaded p0420 code I recently replaced the cat in her car but she had a misfire going on from a spark plug misfire I've heard that a misfire would cause a cat to go bad?? But then I've heard it could be the 02 sensor but we ordered a new 1 of those to still p0420?? Any ideas?
1 Answer
1
12/11/2021 10:22 am
Check for any leak on the exhaust as well. Do you have any warranty for the cat?
I checked for leaks with soapy water nothing was really bubbling between exhaust points and I don't believe so I'll have to ask the wife 😅