Check Engine Codes!! =[

Got a problem? Want to find the solution? Check here!

Check Engine Codes!! =[

Postby itsstevenn - July 16th, 2012, 8:34 pm

Hello folks, I have a 2004 Ford Escape V6. I was driving on the highway and when I approached a hill, the car wouldn't accelerate normally and eventually stalled out. I somehow got the car to start back up, but it studdered all the way home. Here are the two codes that popped up.


My question is, what should I get looked at first.. I just had a brand new catalytic converter about 4 months ago.
Posts: 1
Joined: July 16th, 2012, 8:30 pm

Remove Advertisements

Re: Check Engine Codes!! =[

Postby martin-csr - July 17th, 2012, 9:41 am

Search the internet for the codes or youtube for the codes + Ford Escape.
Doing an internet search:

P0420 = Catalyst System Efficiency Below Threshold (Bank 1)
P0402 = Exhaust Gas Recirculation Flow (EGR) Excessive Detected (a faulty DPFE is a common problem w the Escape).

I don't know what your problem is, but one thing that can ruin a catalytic converter is an engine misfire in which raw fuel gets to them - the fuel then ignites inside the cat, causing overheating & I guess carbon buildup. Scotty Kilmer suggests a method for cleaning a cat using lacquer thinner (youtube video).
Posts: 293
Congratulations on reaching 250 posts!
Joined: July 16th, 2010, 4:17 pm
My vehicle: 2002 Escape XLS 2.0L 5MT

Re: Check Engine Codes!! =[

Postby BigSmitty - July 17th, 2012, 11:19 am

Which cat did you have replaced? The V6 has one in front and one in the back of the engine, then another further back along the exhaust line. The P0420 code comes on when the values from the two O2 sensors on the Bank 1 cat are very close to the same (basically a differential between intake/output of the cat). Since it's only one, not both, there's a chance the two O2 sensors aren't connected back on that new cat. Just a possibility of course. I've seen weirder things after coming back from the shop that took a few weeks to show up.

*Edit* Just saw the writeup that you had some stuttering and possible misfire issues. Depending on how bad the cat was that you replaced 4 months ago, it's possible the other one is simply failing as well.
"If my Escape Limited came with every available option, where are my roof mounted twin .50 cal machine guns with steering wheel controls?"
User avatar
Posts: 99
Joined: December 15th, 2011, 7:02 pm
Location: Twin Cities of Minneapolis and St Paul, Minnesota
My nickname: Matt
My vehicle: 2003 Ford Escape Limited 4x4
My vehicle's name: The Grey Goose

Return to Problems And Solutions

Who is online

Users browsing this forum: Google Adsense [Bot], mattc, The Pope and 27 guests