New guy with CEL problem
#1
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Hello to all.
Just bought a used 03 Eclipse spyder. After about 2000 miles check engine light came on. Error code P0421. Replaced upstream O2 sensor and cleared code. About 100 miles later light came back on. I am reading here that it may be bad Cat or need reprogramming or both. Car now has 90K miles on it. Since I am the second owner am I elegible for recall on Cat & reprogramming at a dealer or is it on me?
Thanks for any help
Just bought a used 03 Eclipse spyder. After about 2000 miles check engine light came on. Error code P0421. Replaced upstream O2 sensor and cleared code. About 100 miles later light came back on. I am reading here that it may be bad Cat or need reprogramming or both. Car now has 90K miles on it. Since I am the second owner am I elegible for recall on Cat & reprogramming at a dealer or is it on me?
Thanks for any help
#2
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I am assuming you have the 2.4L? Mine did the same thing, what i did to fix:
Purchase a 3/4 inch spark plug fowler at autozone, its about 2 bucks, drill out the hole to 1/2 inch, install down stream O2 sensor to spark plug fowler, then install into exhaust pipe, clear code, good to go!
This might not be the approved method of doing things but it does work, it will also work if you decide to get rid of the cat all together, but I am completely against that
Purchase a 3/4 inch spark plug fowler at autozone, its about 2 bucks, drill out the hole to 1/2 inch, install down stream O2 sensor to spark plug fowler, then install into exhaust pipe, clear code, good to go!
This might not be the approved method of doing things but it does work, it will also work if you decide to get rid of the cat all together, but I am completely against that
![Wink](https://mitsubishiforum.com/forum/images/smilies/wink.gif)
#4
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here is a pic of what it looks like
![Name: DSC02874.jpg
Views: 146
Size: 38.4 KB](https://mitsubishiforum.com/forum/attachments/new-members-area-4/6449d1501360672-new-guy-cel-problem-dsc02874.jpg)
the small hole on the end needs to be bored out to a half inch diameter, this will allow for the "nipple" on the O2 sensor to fit into it, the sensor will screw directly into the fowler and the fowler with the O2 sensor screws into the same spot it came out of
![](http://img70.imageshack.us/img70/3052/headerswcatsxs9.jpg)
![](http://ephatch.com/images/fouler/12.jpg)
You only need to use one fowler by the way and it is located behind the cat under the car
![Name: DSC02874.jpg
Views: 146
Size: 38.4 KB](https://mitsubishiforum.com/forum/attachments/new-members-area-4/6449d1501360672-new-guy-cel-problem-dsc02874.jpg)
the small hole on the end needs to be bored out to a half inch diameter, this will allow for the "nipple" on the O2 sensor to fit into it, the sensor will screw directly into the fowler and the fowler with the O2 sensor screws into the same spot it came out of
![](http://img70.imageshack.us/img70/3052/headerswcatsxs9.jpg)
![](http://ephatch.com/images/fouler/12.jpg)
You only need to use one fowler by the way and it is located behind the cat under the car
Last edited by DigitalEclipse; 06-21-2011 at 05:35 PM.
#5
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Great pics and info Digital Eclipse,
But the code tells me its the O2 sensor upstream before the CAT. Did you have the same code P0421 ? And did this fix your problem? Will this just put the sensor in a different stream of exhaust and that solves the problem?
Thanks
But the code tells me its the O2 sensor upstream before the CAT. Did you have the same code P0421 ? And did this fix your problem? Will this just put the sensor in a different stream of exhaust and that solves the problem?
Thanks