Just wondering how much of a difference it makes. Have got fault code showing bank 2 lambda is dodgy/knackered. It may well have been like this since the engine has been in the car.
It runs fine, does not appear to have a prob but performance does seem to drop off after a week or so after re-setting ECU. No major diff but noticeable.
From what I understand the ecu will compensate for a dodgy sensor with settings from memory to enable engine to keep running but it is not an ideal situation.