[ilyt]

Mapping is not recalculated in flight, it is loaded from flash (or via obd when tuning) and normally not reloaded till restart. You might have some luck with short/long term trim fixing it, or not.

If you're lucky ecu might crash or run rich in that one rpm/load point, if not it might run lean entire highway drive, if say a bitflip happens to flip lambda probe settings to always show mixture being too rich.