Td5 Auto Gearbox Warning Lights

My dash gearbox warning lights are coming on consistently now when selecting drive on my auto gearbox. Switching off the ignition usuallly solves the problem, but it becoming more frequent. The car still drives with the lights flashing, but with reduced power.
What is the problem??

2003 TD5 Auto.

Most likely its the wxyz switch on the side of the gearbox,but there are other causes too.Its £90 odd + Vat,but you need to stick it on Testbook and read the logged codes/watch the live data on gear position.
Dont keep driving it like this,it needs to be sorted - you are pulling away in 3rd gear.(Limp home mode)