Hey guys having snags with my audi a4 sline 2.0 tfsi B7

I've been getting p2293 code for ages been running diagnostics, changed all the following

Diverter valve
Cam sensor
Oil filter
Fuel filter
Cam follower checked and was fine (not worn)
Low pressure fuel sensor

And still getting limp mode! Only in high gears though around 3000rpm for gear 4 5,6 under heavy load just gives out... no kinked lines no air leaks... I'm at a loss!! Please help