I was driving today, at about 45mph and the check engine light came on. The car has about 137k miles, and is running great, and I have no idea what could be wrong. I installed an aftermarket intake a week or 2 ago, not sure if that could be the problem. Anything common happen when you get up to high mileage?
Should I put the stock airbox back on and take it to the dealer?

 

Get the code pulled at a local Autozone.

 

How much does that cost?

 

yeah when i put my intake on the CEL came on. went to the dealership and it turned out that the wire coming from the intake became frayed somehow? but they fixed it and put the code in to turn the light off. about $60

 

It said I have a catalyst efficiency. I assume my catalytic converter is about to crap out. Is this something that I should replace immediately? We don't have emission testing or anything where I live..

 

I'm not allowed to drive my car anymore now, because the check engine light came on.

 

Sounds like you're either having catalytic converter issues, or you have a bad O2 sensor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Harlowe &raquo;</TD></TR><TR><TD CLASS="quote">I'm not allowed to drive my car anymore now, because the check engine light came on.</TD></TR></TABLE>

lol, you serious? drive it. nothing wrong with it, just a bad o2 sensor (or bad cat), i got this same code on tuesday, checked it yesterday, and its the same code. replace o2 sensors first, if it is still on, it's the cat. it won't break your car, you'll just pollute more then usual.

CEL checkup is free at advance auto parts. i deleted mine at the same time.

 

i had the same problem when i put an intake on my car. what happened was that the sensor on the intake wasnt all the way in. i pushed it in again and drove it around for a little and it shut off within an hour or so. so check the sensor.

 

Yeah, I took it to AutoZone and got the CEL checked out yesterday. I'm thinking it's the secondary o2 sensor, because it feels the same to drive and all, but I don't know. My dad's letting me drive the car now, since I explained it to him. He was just angry from work or something . I'll check my MAF sensor too, it's kind of streaching to get there.

 

if it was the MAF sensor, it'd say that on the CEL code. it's definitely something to do with the catalyst.

glad you can drive it though, it doesn't affect anything.

 

Yeah, I'm looking at BOSCH o2 sensors, or should I just go with OEM?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Harlowe &raquo;</TD></TR><TR><TD CLASS="quote">Yeah, I'm looking at BOSCH o2 sensors, or should I just go with OEM?</TD></TR></TABLE>
oem

 

How much is it?

 

It went off this morning when I started the car up to get to school.

 

yep, it'll keep doing that