Ok, I got these two puppies . . .

P0139 - Heated Oxygen Sensor 2 Circuit Slow Response (Bank 1)
P1147 - Heated Oxygen Sensor 2 Maximum Voltage Monitoring (Bank 1)

Any idea what could cause these? Is it just replacing the oxygen sensor? Which one is #2?

Thanks

 

I read about the TSB for it. TSBs aren't free to fix by Nissan, right? Especially, if I'm out of warranty?

I'll need to eat this one, won't I?