Catalyictic converter failure
6 months ago I bought my Jeep Grand
Cherokee , in the paper work the original
owner gave me the cat BANK 1 has been
replaced , when I bought it I had to replace
that same cat (bank1) now that cat I
recently I just got done 6 months ago is
failing again which has gave me a p0420
code :( my question is WHERE DO I START
to look for what's causing the same cat to
fail PLEASE thank you in advance!!!
Aftermarket catalytic converters do not last as long first of all. Second, this code doesn’t necessarily mean that you have a bad converter. It might be an exhaust leak. What is the temperature going into cat and coming out?
It's pretty apparent and the noise it makes it noticeable too, the cat has also changed color, I believe I may have an exhaust leak (I know nothing about cars) but the new muffler I put in is definitely showing signs of burns, where do I check for an exhaust leak? I have no clue how may I determine?
For burn purposes, get under car cold and start up and find puffing joints/connections that are leaking. Also louder noise can help find leak.
Really appreciate you , any other tips hints you can throw my way ??
You should also have the vehicle live data scanned, there maybe a problem with fuel trim, if it cycling way too much there could be an internal engine vacuum leak or bad or leaking injectors on one bank. HTH
It's killing way to much gas, LIKE unbelievably before i even thought about an exhaust leak I thought about the injectors. I need to get those checked out as I have not had or checked those myself since I've bought it
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