Getting a fault powertrain sensor 1 bank 1 which sensor is that and how do I change it

Thanks

And could I have a link to the one what I need thanks

is the first before the cat.Is easy to replace,just unscrew it and unplug the connector,but you will find it is tight like hell.

is the first before the cat.Is easy to replace,just unscrew it and unplug the connector,but you will find it is tight like hell.

where about is it located thanks had a quick look this morning

under the car before the catalitic convertor

Thanks so it lie under car job 

lol would be the most dear one the 5 wire