03 Lancer OZ rally,Code P0421?

well,
 
just bought 03 lancer oz rally yesterday,ses light came on. Went to autozone,printed me out the code,and reset it. it came on again.
 
could be catlytic converter,engine misfire,large vacuum leak,engine oil leakage..
 
has anyone ever had this code and how much did it cost to get it fixed?
 
thanks

Its definitely a problem with the cat, might be the sensors on it, or the cat itself

Edit: double post, my bad...

what if it was problem w/ cat itself? How much would that cost or how serious is that if went unfixed for while? have appointment with my mits dealer for wednesday,gonna charge me $94 for diagnostics..it has 102k miles..

My friend thinks its the oxygen sensor on the exhaust..

Its prolly a good bet, its the sensor im talking about, so it can be that or the cat, about the cat, the price will be one for a new cat, and the installation, and if it ts the sensors, you might need to change em

Well,
 
I heard P0421 is a pretty common recall. Im not real crazy about going to the dealer,might try some local place instead..$95 just to diagnose what we probly already know it is?
 
what do you mean by, "the price will be one for new cat?" you mean 1,000? lol..hopefully dealer will do it free if recall..

DO A SEARCH!


been covered a hundred times.  Theres a recall on your car.

So,i shouldnt take it to dealer right? just to charge me $100 for what i know it is..

quote:

ORIGINAL: kevin10

So,i shouldnt take it to dealer right? just to charge me $100 for what i know it is..

once again, do a search.
if you have an open recall on your car, the reprogramming is free.  Cat. converter replacement is free up to 100k miles.

quote:

ORIGINAL: Manybrews

quote:

ORIGINAL: kevin10

So,i shouldnt take it to dealer right? just to charge me $100 for what i know it is..

once again, do a search.
if you have an open recall on your car, the reprogramming is free.  Cat. converter replacement is free up to 100k miles.

 
He has 102k.
lol

reprogramming for what? Well,not sure about replacing cat converter,gonna set up a time to take it to local mechanic,with the info i have and code. My friend looked at my egr valve and said he thinks it needs replaced and thats whats causing my ses light..

quote:

ORIGINAL: kevin10

reprogramming for what? Well,not sure about replacing cat converter,gonna set up a time to take it to local mechanic,with the info i have and code. My friend looked at my egr valve and said he thinks it needs replaced and thats whats causing my ses light..

do you actually read the posts in this forum?

its been covered many times, but Ill repeat again...  There is a recall for your car.  Due to incorrect software parameters, you may damage your cat. converter.  New software must me uploaded to your PCM, which your "local" mechanic cant do.
The cat. converter must be replaced, but you are no longer eligable for it under warranty.   Either you or the previous owner has choosen to ignore the recall notice sent to you (or them), and as such are now in a position where you will need to pay for the cat., although the software is free.

and how much would the cat be? or i do i want to know..i just bought a car, i cant afford to pay much now..

no ive hadnt had that happen yet i just bought mine like 3weeks ago.the only thing that i have wrong is my brakes make a noise when i hit them a little anyone had that problem before?