P0139 Error

[Andrew34]

Hello, i have a question about P0139 Error.

I'm running a 2019 Si and just installed the prl cobra intake, front and downpipe combo (catted), and Map performance exhaust. I've mapped the starter/19.5 psi tune on Ktuner and flashed it. I'm good for about 30 miles or so then the p0139 error comes up. I've disabled p0420 - the catalyst efficiency option and I've tried to disable to p0138/9 - o2 sensor. When I disabled the o2 sensor i drove for about 40 miles and had about 6 lights come on my dash. The Ktuner through out the p0172 error. I then flashed back and kept p0420 off. Any help would be greatly appreciated. I've also disabled Rev Hang.

Thanks a lot!

[KTuner]

P0172 means you're running rich, if you look it up. Look at the intake, specifically if you got the RACE MAF and didn't account for that.