Barak37

My check engine light came on after I installed longtube headers and muffler upgrade what happened to the computer or is the O2 sensors burnt up. It does have catted mids and a cold air intake that was installed before the exhaust system.

TooLateVTEC

iTrader: (2)

Take it to auto zone or some auto parts store than can scan them for free and tell you the code. Its probably an 02 sensor code since you just did headers. Erase it and see if it comes back.

If it comes back, they're probably shot.

Barak37

Ok thanks wanst sure what to do

Sales2@Texas-speed

iTrader: (5)

Be sure to report back here with the CODE NUMBER after they scan it. Usually the guys that work there will try to tell you the exact problem and want to sell you a part...when in fact, you might not need that O2 sensor or whatever after all (that's a common one when it says bank x lean or rich, they want to sell you a sensor when it could easily be a vacuum leak or something).

Nick_Rapitis

iTrader: (15)

if you took out the cats its gonna be the rear o2 codes doing it...get em tuned out or get o2 sims...or cats

Barak37

the code for the engine light was P0420

pheer

iTrader: (3)

yeah, thats the O2 sensor right?
had the same thing on my impala when i got the exhaust done with a custom downpipe, says something about the efficiecy level isnt high enough for the cats or something i think...

Barak37

yeah I found out it was after cats O2 code because i havent had it tuned yet