Peugeot 406 TD 1998

If it is from the oil pump you have to take it out and send it to a pump workshop to repair and calibrate it.

I know where I get lost, I wanted to know if anyone knows if I can disarm it without problem.
Lose on the nut again hollow calibrated (with out label) so it says that it is called on the Internet, it is in the back of the pump.
What function does that nut fulfill, it can be disarmed must have some o.ring because or aluminum washers because it loses out there

thanks.

Thank you Kikemec that was the solution I took it out and sent it to change all the O'Ring and put it ready. And ready.

From what you say, I also think it is the injection bomb. I had one like yours and the same year and among the many things that came out, this was one of them. Once they disassemble it in the specialized workshop you will see which piece is wrong, but the most expensive thing is without a doubt is to assemble it and put the pressure it has to be mounted. It is a expensive repair, although obviously until they disassemble it and see how it is cannot tell you an exact price.

All the best

Sorry, I hadn't seen the 2nd page with the latest comments I'M Sorry