I was having intermittent reduced power mode about once a week for close to 6 mos, any code I could get out of it pertained to tbody. Finally, got it to act up 3 days in a row and Baro was way off, trouble starting cold. It was fueling like it was at 9,000 feet.
Fortunately for me, tbody is still ok and I didn't need to replace it. We'll see what happens next year when the weather gets cold again tho.