Well, recall that there are two micro switches on your brake pedal linkage - the brake light switch and the low pressure switch. The LPS is actuated second as you press down on the pedal. When the switch is actuated, that tells the ECM to check and see what the brake system pressure is. If it's not above the set point, you get the code, and unfortunately, it locks in. If you don't have a leak, then this is usually a sign that your pads are ready to be replaced, or that you need to bleed / flush the brake system and get new fluid in there. After you do any brake system maintenance, you want to be sure to top off everything and pump up the system and seat the pads and pistons BEFORE you turn on the key. Otherwise, you get this stupid code, again.
Right now today, if you feel that your brake pedal feels a bit soft, then that's why you got the code in the first place. You'll need to address that first.
You can try a reset on your own. Works about 10% of the time. If you have a shop manual, you'll find this in the brake section.
Be sure that the key has been off for at least 30 seconds.
Turn on the key and allow the system to completely boot up.
I don't know if it is required to press the MODE button or not. That's not addressed. Try it either way.
Press down on the brake pedal as hard as you can and hold it there.
You may have heard the second click as you activated the LPS. Or may not. That's not required.
Keep pressing down on the brake pedal as hard as you can and turn the key off.
Keep pressing down on the brake pedal as hard as you can until the system shuts down after 30 seconds. Don't be in a rush to let up on it.
After the system shuts down, let up on the brake pedal, cross your fingers, and turn on the key to see if the brake failure clears.
Repeat as necessary. Otherwise, you'll need BUDS to reset the thing even though your brake system is working fine.
That link I provided in the other post is for you and anybody else that needs it.
Good Luck.
PS. Really happy that you're recovering well. Keep that up.