KTuner.com

I've flashed it back so I'm no longer getting the p0172 error. I'm only getting the p0139. Sorry for the confusion.

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 efficienc...