Ok guys here's one for you, took car in for wheel alignment to try and help find issues with HDC suspension fault popping up on dash, the guy done a diagnostic check for me before doing wheel alignment and the pictures below show fault codes can any one help as to where i start in getting the two main problems I'm having with my RRS TDV8

1) Oil warning light (on more times than not)

2) HDC suspension amber warning light (comes on after a few miles)

changed brake switch as suggested on a number of forums (OEM part) no change, any help will be appreciated...

One of the errors is to do with a knock sensor and you've found one not connected. Makes me wonder whether someone has had the loom apart when doing major surgery and not put it back together again properly. Hence your other odd errors. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed