Wow... You have all the luck!
This sounds like a new problem with the P0132 and is usually just a bad sensor. Coding for high voltage on the circuit is its way of telling us that the internal heater is dying and it's not coming up to temperature.
The high voltage is then misinterpreted as a rich mixture and the PCM starts taking fuel away. It won't completely die out, but gets pretty... soft.
Going to wide open throttle is a great way to bypass a bad UPSTREAM 02 sensor. The PCM doesn't look at the 02 signal at WOT, so it can't be affected.
And when it somewhat cleared up by itself... that totally fits the mold. You need a bank 1 UP02. It will be located in either the y-pipe exhaust connection between the two banks or in the left side exhaust stream just down from the manifold, depending whether your system uses 2 or 4 oxygen sensors
The PCM... sounds like aCustomerLOL! Yes, it does need to match the vehicle's VIN or you will have an ABS lamp on like you're seeing. I can't account for the beeping though! This is news to me.
Regardless, you'll need to see the dealer now. But I have info that may help you out! I know how to re-write the VIN in your new AB engine controller.
Have the tech go into ENGINE with the DRB3, push right arrow to get to MISC as you always would to install a VIN. Select option 4 (READ VIN) and when the display comes up, push PAGE FORWARD. This allows a re-write. Install VIN, push PAGE BACK, then install vehicle miles.
After that, it's off to ABS. It may only require erasure of the VIN mismatch code, but my guess is the electronic pinion factor was lost somehow. That's the only reason I can imagine for the flashing yellow ABS lamp... it's no longer initialized. Once the pinion factor is installed, erase ABS codes and you should be done.
The AA- AB thing MIGHT bite you in the butt. Remember the P/S switch update for your earlier stalling? This version probably carries the software, which will now be looking for an eventual power steering switch state change, one that will never happen without installing the TSB update stuff.
Going back to the original PCM will solve that, but the ABS still needs to be re-initialized I think. Probably best to print off at least this last post for reference... Let me know how it goes Knight! If you're in the Denver area, let me know!