i am looking for sensor 1 bank 1 lambda sensor. i have found what i believe to be two sensors at the back of the engine but lord only knows if this is right so looking for clarification. If you peer over the engine towards the windscreen, it looks like the exhaust manifold comes out there, I can see two sensors (one left and one right) that look a little like spark plugs i guess. Am i right in thinking these are the lambda sensors and if so which one is sensor one bank one? one seems to go to a green plug and the other goes to blue.