I recently installed a Stillen true dual with their High flow cats. Shortly after, my check engine light went on. The code was P1283. The dealership replaced the O2 sensor that was throwing the code. Again, the same code went off. I checked and tightened the entire intake which is to include, MREV2, 5/16" spacer, and the K&N intake. I called Stillen and they can't seem to come up with a solution. Anyone have an ideas on what the problem is and how I can possibly fix it? I was thinking about getting a tune, but I was informed that it may not solve the problem. Please let me know. Thank you.

 

High flow cats do not meet oem nor Federal Emission Specs [emission dyno measured specs]. Off Road Use Only.
I'm surprised the dealer worked on an obviously emission tampered car.

 

Every state is different with emissions. Even High Flow cats do restrict air flow, however, considering it's a true dual exhaust, each cat works independently with it's own bank. Besides, Infiniti doesn't void warranty because nothing internally was altered. I have catalytic converters which meet Infiniti's standard. How does this help my problem by-the-way?

 

I have high-flow cats - no codes here. (And the dealer put them on.)