Thanks!

Can you take a look at this photo and tell me which one - A or B is going towards the front of the vehicle? planning on doing a DIY replacing the 2 NOx sensors this coming weekend. Just wanted to make sure.



https://photos.app.goo.gl/hYtfGMN4uzMHFFhu9

Also what does these numbers mean on the scanner. Is -0.02 the bad NOx sensor? Been trying to search "NOx concentration determination" mean but cant find a definition...

https://photos.app.goo.gl/xDaEfKmPFtGHrLnp9