upstream lambda sensor

[Christophe]

Is this one in the cat or pre cat?

Bit pissed off as had it changed as was coming up with a fault and my car kept cutting out, but my car is still cutting out so wondering if they bullshited making me pay for it and whether the othe lambda sensor is knackered now.

 

[Steviant]

Upstream one is in the manifold before the cat.