Hey Folks,

My Land Rover Discovery 2 SE7 has low engine power (poor acceleration) and lots of smoke coming out of the exhaust.

I had my Bank 2 Sensor I (O2) sensor replaced (it was tripping a fault and SES light) and now I'm getting the Service Engine Soon light again with the following codes:

P1174 Cam Sensor Fault
P1171 Oxygen Sensor System Too Lean Fault Banks A & B

Attached are more info from my diagnostic test while driving (BlueTooth is awesome). Any ideas?

 

I would first search for vacuum leaks. Couple of techniques to choose from and a lot of possibilities of leaking.

Also you can test the o2 sensors with an ohm meter. I would recommend replacing both (if not all) anyway, not just the 1. Make sure you have a solid clean connection at plug.

 

Found this.......
https://landroverforums.com/forum/di...1-p1174-50352/

 

I don't know about Rover's in this regard as most of mine until a month ago were not that smart. In most cars though a failing cam sensor will retard the timing etc causing a serious loss of power. My 2 cents.