Problem engine C6 2.7 HDI PowerOff

[Disaster189]

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:



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.

[GiveMeABreak]

There's not a lot of info on the fault codes for this engine unfortunately, but one thing I have found a technical bulletin concerning, stalling and lack of power with the anti pollution warning light on. It generally concerned the C6 2.7 at the 30,000 KM service and the fuel filter. Apparently, the fuel filter, filter-element is clogged following the creation of particles linked to the use of certain fuels and the particulate filter additive additive. The recommendation is to replace the fuel filter which should be done every 30k KMs.

The P1536 fault is of course linked to the brake pedal switch and if this is becoming problematic, a replacement may solve it. As this is linked to operations of the auto gearbox operating, it might be worth sorting that out too.

P0088: Fuel pressure regulation fault : Pressure too low. This may also tie in with low fuel pressure if the fuel filter is blocked.
P0267: Injector 3 flow correction fault: Value too high or too low.
P0278: Injector 6 flow correction fault: Value too high or too low.

I would certainly get the fuel filter replaced and then prime the fuel system after replacement if you have not already done this.

[Disaster189]

Thank you very much for your answer, is there any priming guide for this car? What is the process?

Yesterday it worked well in hot for 80km, but when it started cold the problems in cold returned, if you accelerate in cold the engine stops as in the previous video. I've disassembled the filter box to look for the possibly defective dough in case it was the problem (as in the video) but there was no dough there in my car.

[GiveMeABreak]

I have put a guide up here for the complete fuel filter removal, fitting and bleeding for this engine in the donating members section:

Citroen C6 2.7 DT17TED4 Fuel Filter Removal - Refitting - Bleeding

[Disaster189]

It shows me a message
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You are not authorised to read this forum.

[GiveMeABreak]

Yes, as per my last response, you need to be a donor to access the content there. Details below, which will also allow you to request official part numbers for up to 2 years on the parts thread.

If interested, links are below, then pop your VIN up.

A response to your question by a Forum Admin requiring parts or additional information requires you to have made a current contribution (£10 min.) to the Forum.

To Upgrade Your Membership & Donate Click Here For Further Information About Vehicle Parts and VIN Numbers Click Here

[Disaster189]

Thank you very much for the information, today the diesel filter is going to be changed, yesterday it started and in cold you feel a very strange noise like cyclical air, and the engine is noticeable that it is not working properly, the following failures also appeared:

P0088
U1218
U2000
P1963

In the browser appeared antiparticle filter error, although Diagbox does not throw nignun error there of the filter of particles ... Everything is very strange, I do not know what else to try, I thought about checking the masses of the engine in case they had rust or be in poor condition but I did not find their location.

I upload one video in Icloud:

https://www.icloud.com/attachment/?u=ht ... z=53866998

[GiveMeABreak]

What I mentioned previously may still be valid. The diesel additive fluid contains particles or Cerine that block the particle filter (as they cannot be burned during regeneration). Because the additive is injected into the fuel tank, these are contained in the diesel in small quantities and therefore will end up going through the fuel filter. So this is one more element that can contribute towards the fuel filter blocking and why they are scheduled to be changed every 30k KMs.

When the filter is replaced the system needs bleeding - just replacing the filter is likely to cause problems.

P0088 Fuel pressure regulation fault: Pressure too low
U1218 Built-in systems interface data not valid fault: Value received incorrect
U2000 Remote controlled triggering fault: Main wake-up fault: Value received incorrect

[Disaster189]

will the diesel filter be changed these days and check to purge the system, what can you tell me after watching and listening to the previous cold start video? A rare noise

thanks!

[Disaster189]

What I mentioned previously may still be valid. The diesel additive fluid contains particles or Cerine that block the particle filter (as they cannot be burned during regeneration). Because the additive is injected into the fuel tank, these are contained in the diesel in small quantities and therefore will end up going through the fuel filter. So this is one more element that can contribute towards the fuel filter blocking and why they are scheduled to be changed every 30k KMs.

When the filter is replaced the system needs bleeding - just replacing the filter is likely to cause problems.

P0088 Fuel pressure regulation fault: Pressure too low
U1218 Built-in systems interface data not valid fault: Value received incorrect
U2000 Remote controlled triggering fault: Main wake-up fault: Value received incorrect

Replaced fuel filter but everything is still the same.

There is a cyclic noise like air in the motor (you can hear it in the video)

https://www.icloud.com/attachment/?u=ht ... z=53866998

[GiveMeABreak]

If you bled the system correctly, then I can't advise further as there is no detailed info on these faults to hand for this engine unfortunately.

[Disaster189]

If you bled the system correctly, then I can't advise further as there is no detailed info on these faults to hand for this engine unfortunately.

Yes, the system is bled correctly.

In the video it sounds like a noise of air in the engine, something strange (I haven't found anything similar out there)

Thank you for your time, hoping to find the problem and solution

[GiveMeABreak]

That's why I asked about the bleeding - it requires special connecting pipes to do properly...

[Disaster189]

That's why I asked about the bleeding - it requires special connecting pipes to do properly...

The fuel filter bled, nothing more, is there something else to bleed? The noise is very strange

[GiveMeABreak]

It's all linked in one of my previous posts, so if you aren't doing it properly, you can expect problems.

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