Ok, here's the situation. I have had DC JDM 4-1 headers now on my 01 ITR for three months, along with a high flow CATCO cat, and have had absolutely no problems. Both O2 sensors are hooked up, one before the cat in the header, and one after the cat in the exhaust pipe.
Then, all of a sudden tonight while driving, my check engine light came on. I just checked both O2 sensor and they're plugged in tightly, and no, I haven't been bouncing the rev limiter or overrevving. The only thing is my car was just at the dealer to have the clutch replaced, but I don't see why that would have affected anything.

Anybody have any ideas why my check engine light came on? Does it necessarily have to do with my emissions, or could it be something else? Please help me!!!
Thanks.

 

Get the code and we can go from there...


Jason

 

1) you only have one 'header' on your car. no headers.

2) get the damn code so we can officially send you an application to we-todd-did racing.

 

http://www.eastcoastdelsol.com/columns/view.php?id=9

 

probably just messed up a o2 sensor