Could be upstream, think upper intake connections.

 

Did you ever resolve this? I’ve got 1174

 

Yes, it ended up being that the lower intake manifold gasket got messed up when I installed it. If you have other codes related to oxygen sensors, I would change those first. Otherwise I recommend doing a smoke test to try and figure out where the leak is Since there are multiple gaskets that could be causing the issue. https://landroverforums.com/forum/di...achine-125874/