Getting a P0421 code! Popping sound in exhaust. Odd idle.
 

Okay, so I got the code from another guy at Advanced auto,. He was pretty upset because this one slow guy didn't give me the code... He also said "it says catalytic convertor" which it didn't! It said catalyst!


Anyhow, I want to fix that error. He cleared the code for me.

I have inspection tomorrow.

Now, I posted on this site before, but this time I posted in the right category, I believe.

Read my other post below

I turned my car off, and it seemed like something was bubbling... I turned it on like 30 minutes after, and it sounded like it wasn't getting oxygen. I also hear a popping noise behind the engine, maybe underneath..
Now this code P0421 is appearing.

So, what's wrong with my eclipse?
:/


http://www.club3g.com/forum/3g-eclip...eird-idle.html