Keep getting P0139 Error

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danimalatk
Posts: 2
Joined: Fri Jan 22, 2021 8:24 pm

Keep getting P0139 Error

Post by danimalatk »

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.
KTuner
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Posts: 3744
Joined: Mon Jul 22, 2013 8:13 pm

Re: Keep getting P0139 Error

Post by KTuner »

P0172 is not P0139, so I don't really follow what you're saying here.

You should probably check your fuel trims. Make sure you've chosen the correct MAF calibration.
danimalatk
Posts: 2
Joined: Fri Jan 22, 2021 8:24 pm

Re: Keep getting P0139 Error

Post by danimalatk »

I've flashed it back so I'm no longer getting the p0172 error. I'm only getting the p0139. Sorry for the confusion.
KTuner
Site Admin
Posts: 3744
Joined: Mon Jul 22, 2013 8:13 pm

Re: Keep getting P0139 Error

Post by KTuner »

I've mentioned what to check. We can't advise you on disabling emissions equipment, but it sounds like that worked for you regarding that specific code. You can also refer to the manufacturer for any directions they have on their parts, defouler, etc. There's tens of thousands of these 1.5Ts on our platform and what you're referring to isn't something our platform causes.
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