Ok Jay, thanks for coming forward and telling us about your experience with the P1373 code. This makes about 4 of us now who experienced this right after installing the Cobb PDK software. I am sure that there are a lot more people out there who are having this problem but have just not reported it yet. Everyone dealing with this has tried different things to alleviate it, but so far no luck. I have completely uninstalled my Cobb AP including the engine ECU and Pdk software, This has helped reduce the frequency of the code but it is still there. If we continue to get more people with this problem telling us what they have tried, soon or later maybe we will accumulate enought data to figure it out.

Jay, you certainly have made an all out attempt to try to find the cause of the P1373 code. In doing so you have eliminated many of the possible cause for it. In your message you mention that the code you are getting is P1372, is that a typo and did you mean P 1373?
My car has had the Cobb uninstalled for now for more than a month, and although i still have all of the stage 4 hardware, I am running without a tune. And before any tunner will tune the car, they want to know the condition of the engine. So we did a leak down test on it to determine this. It passed that will no problem but we found that the spark plugs were completely fuel fouled, it must of been caused by the Cobb running a very rich mixture. So they are being replaced along with the coil packs. But the most serious problem that was found was the right 68 mm turbo had bad oil seals and was leaking oil into the intercooler. Both turbos have been removed and sent out for repairs to a local turbo rebuilder. We hope to them back and the car running again within a couple of weeks

Yes I thought that it might have been that but all of the codes that I have seen have been on bank 2. Well hopefully the repairs that I am doing will cure the problem, but either way I will let you know.