27E1, Oxygen sensor after cat bank1. Time to change the sensor?

[romero1990]

This pops up when I was figuring out driver's airbag error.

Does it mean now is the time I change the sensor? or should I wait?

It's not throwing any emission code yet, just ISTA+ readout.

BTW, which side is bank 1?

[Bubbles]

How many miles on the current O2 sensors. I’ve swapped the precat sensors every 30-40k. I don’t bother with the rear sensors since I’m running akra evol and rears sensors are likely toast.

[romero1990]

Originally Posted by Bubbles

How many miles on the current O2 sensors. I've swapped the precat sensors every 30-40k. I don't bother with the rear sensors since I'm running akra evol and rears sensors are likely toast.

Since you mentioned, the car is running north of 120k, and has been probably been changing it once on record. Do you swap them out cuz of code showing up or?

I suppose I should do both at the same time?

[Bubbles]

Originally Posted by romero1990

Since you mentioned, the car is running north of 120k, and has been probably been changing it once on record. Do you swap them out cuz of code showing up or?

I suppose I should do both at the same time?

First time was due to a code at 40k, subsequent change was routine changes (3x) is part of my routine maintenance. Do both since you’ll be under there already. Bosch sensors are less than 80 from rockauto.