Had the sump off, cleaned out, pick up blasted out ect... put back together... 

 

Blasted out the turbo lines aswel when I changed the turbo. 

 

Filled up with fresh oil and new filter (4.5Ltrs), yet Orange light remains! 

I did clean the sensor but I guess it's knackered 

Id guess it kaput too orange is oil level red is presure

That's what I'm thinking.. checked level this morning out of pure paranoia after the sump and pick up job yesterday and level is Fine..

 

I will change the sensor in 1000 miles when I drop out the current oil 

Right chaps. ..

Disconnected the battery as I was trying new ecu and when I reconnected battery after refitting my old ecu, the orange oil light has gone off.! :-)

Sorted

Win win