I've been having a couple of issues with the 2nd lambda so I went to change it yesterday. Long story short the thread in the hole is damaged which means I couldn't fit a new sensor. I didn't want to remove the whole exhaust to sort the thread (its a 3inch system so is rather tight!), so I put the old sensor back in and just didn't plug it in.
I took the car for a drive and was suspecting error codes all over the place but it seemed fine. The only problem I had was a slight hesitation/misfire on one 3rd gear pull, but I think this is a mapping issue that is separate.
I did think you could just disable the 2nd lambda reading, although the OBDtuner manual specifically says that the 2nd sensor is required.
Any advice? Can I get away with this or do I need to either sort the exhaust or make a 'cheater'