[symobec]

have a 2002 kangoo 1.5 dci. it starts fine and runs but every time I accelerate or put the engin under load I get 3 warning lights on the dash. they clear once i take my foot of the pedal. Ive cheaked it with snap on and it stored: rail pressure regulator high flow current below minimum, and rail pressure regulator above maximum. any ideas please???

 

[DasYad]

I've experienced similar pressure related issues on a Megane II 1.5 dCi, was diagnosed as a high pressure fuel pump failure. I would get it looked at by someone who knows what they are doing because if it is the fuel pump then it can be quite an expensive fix.