Hello Guys,
Thank you so much for the help on my previous post. I did have the wrong cylinder order. Replaced the coil that was coming up on the OBD2 and it fixed it. Car feels great!
But a day later my check engine light came back! Haha of course.
P0421 - Warm Up Catalyst Below Threshold Bank 1
I did some research already. Reset the code and it came back 2 days later. From what I can find, there is a lot of talk of the upper catalytic converter and this code. I hear that since I had been running on a mis-firing engine for a few weeks, this could have sped up the degradation of my cat. (i have around 110k miles on my car) I was told that it shouldn't really affect my driving, but I do live in CA so when i register my car Ill need to have it fixed.
Does this sound about right? Or are there other things I should try first...IE 02 sensor and whatnot. Im not really sure how to test it.
Thanks again!
Jason