u/Minute-Reading-4762

I got a call from my dealership about the recall for the mt09 for a tps issue and an ecu flash..I took it in because it did have a slight stutter/hesistation crusing around 3000rpm I picked it up today and it was completely unrideable…felt as if it was falling on its face up to 4k rpm and then would take off like a bat out of hell and I wasn’t able to change the ride modes or go into my setting so I rode it back to the dealership and they are saying it’s because my o2 sensor is bad…doesn’t make any sense to me but I’m not a motorcycle mechanic by trade or some master mechanic just wanted to see if anyone else has experienced this issue or can give me more insight on the real issue