Yeah i understand this part fully. The trims are keeping the afr at the 14.7 in CL.So, let me say this.
THEORETICALLY with trims enabled, the car would be running around 14.7 AFR, and your AFR error should be close to if not zero. Your STFT's are why they are close to zero.
disable closed loop entirely and then they won't be.
but the AFR error and STFT's you get in closed loop with LTFT's disabled still won't match up exactly.
In OL the afr error should have had similar values though to what the trims were doing (or is that wrong?). I was only getting a couple of percent error but reading like 12.5 (which is more like 14%). This is the part that has me confused. I want to pull another OL log and see what im getting error wise