Disaster189 wrote ...

Hello,

I need some help with the Citroen C6 2.7 HDI 2008.

A few days ago it started to shake as if a cylinder had failed, I kept it in the garage and the next day completely cold, start, accelerate cold and it turned off immediately. I have emptied the fuel tank and I have put new diesel of good quality at the same time as a Xenum injector cleaner, then the car has started well (if you accelerate cold it turns off immediately) if you let the car warm up everything works fine.

I have passed Diagbox and I have seen the following error codes:





I have seen this video that exactly the same problem occurs (when accelerating from cold it turns off immediately) although it says that when hot everything works fine like it did for me and it says that it is a bad mass under the air filter:

- Click Here -

The problem is that when cold it is also noticeable how the injection fails a little, I don't know if it is related to the same mass or they are different problems, a particle filter error message has also come out now, all at the same time... A little weird.

Any ideas? Thanks in advance.

Citrofix wrote ...



I see you have P0088 diesel pressure too high or low, don't remember, there is also a P0087 code (high or low). Check actual pressure according to reference/target pressure with diagnostics and data recorder, curves should follow each other very precisely. May be a problem with the pressure regulator valve on the bottom of the high pressure pump. I had it once, found small bits of plastic obstructing the movement of a small piston inside the regulator valve. No idea how they came there...

Regards, Christian