Modified 2005 ST P0420 - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Focus Fanatics > Ford Focus Tech Discussions > General Technical Chat

General Technical Chat This section is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 09-07-2012, 05:31 PM   #1
afraziaaaa
Focus Addict
 
afraziaaaa's Avatar
 
Join Date: May 2007
Fan#: 47383
Location: Green Brook, NJ
What I Drive: 2005 ZX4 ST

Posts: 1,156
FF Reputation: 24 afraziaaaa Great Standing Member
Buy-Sell-Trade Rating: (10)
Modified 2005 ST P0420

Ok, so I fixed the last code that I had (P2004) with new vacuum lines.

Now, I am trying to get a NJ inspection (never move to NJ if you have a modified car unless its more than 25 years old).

I had to detune the car to the stock tune because none of the electronic monitoring systems would show up as "READY" for the inspectors while it was running on aftermarket tune. So now, it runs, but I have CAI, 2.5" exhaust and Crane stage 1 cams so I am most likely incredibly lean. Once all the systems reset, the code P0420 came up. It basically means that the cat isn't working properly.

So, my plan is to go back to stock cams and see if the code goes away.

Two questions:

1. Has anyone experienced this or a similar scenario?
2. If the code does not go away once I replace the cams, is it still possible that I have a bad downstream O2 sensor?

I have already looked all over the internet for information and found what I needed. I am not looking for info, but more for anyone's personal experiences and tips/tricks to get this fixed without having to drop several hundred dollars for a new exhaust manifold.

Once I get the car fixed and inspected it is going up for sale, along with several of the bitchin aftermarket parts I have for it. I needs me a truck!

Thanks for looking and for any advice.


afraziaaaa is offline  
    Reply With Quote
 

Bookmarks & Social Networks
-->
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 09:41 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.