Hi Ian

I know exactly how you feel, I'm 71 and have always done my own repairs and have stuck to pre 2000 cars so I can continue to do so, but I have just succumbed to a 2.0Hdi 406 but I have also bought a lexia code reader - just in case.

That quote sounds pretty pricy to me, is the pressure regulator actually part of the turbo and not available seperately? I would take it to a diesel specialist, they usually know more about them than the dealer and are usually cheaper. If you could do it yourself a secondhand turbo would be very much cheaper. I can still bend just about enough to take on these jobs - but I don't know for how much longer!

Peter

It may be worth posting this query on a Peugeot / Citroen forum, they are more likely to be able to narrow down the exact meaning of the fault code.

However, from my experience of the 2.0 PSA / Ford TDCI diesel, it can refer to one of a few possibilities.

The turbo doesn't have a conventional wastegate, it has a set of vanes or blades which direct the exhaust gases. The actuator for these vanes is a vacuum-operated device, controlled by a solenoid which applies or diverts vacuum to the actuator.

Either the vac diaphragm can fail (rare); the variable nozzle mechanism in the turbo housing gets soot build-up and starts sticking in the high-boost position, causing overboost and the engine to go into "limp home" mode (more common); the vac solenoid can be faulty; or the boost pressure sensor is faulty.

Just slinging a new turbo at the car, as the dealer recommends, is potentially a huge waste of money without further investigation.

Hi,

I was wondering what was the fault in your car. I have the same problem and so far paid £190 to the dealer to tell me that the car has a fault. (that I knew already thanks to my friendly mechanic and his diagnostic tool that returned codes P0380 - pre heater circuit and P0245 turbo charger solenoid valve).

Despite my attempts citroen bolton insisted on replacing glow plugs at a cost of £220 without the guarantee that this will resolve the issue. I saw no suggestions of doing that in replies in here but glow plugs based on the main service engineer from citroen bolton are operating most of the time even when engine is running. What a bunch of nonsense. I am Polish but contrary to the popular belief I am not an idiot. So I decided to thank citroen for nothing and try the net to find solutions that will not involve gambling my money away for citroen to practise their poor mechanic skills. Its worth to mention that if I went to my Polish mechanic I would not be charged for information that I brought to them myself. Also my mechanic had a university degree and has common sense and not just greed to skim people out of hard earnd £££. Rant over.

Now I would appreciate if you could let me know what part have you replaced. My car goes in to limp mode when up hill or under slight load. On the dash board error message is completely different from the diagnostic and it rereads (ESP/ASR not functioning followed by antipolutant fault) ESP don’t work in limp mode apparently. Antipolutant fault suppresses even me as FAP was replaced 3 months ago and 3 L of ELOYS was purred in to special tank. Diagnostic does not show any problems with this but the dashboard has other ideas.

I like Citroen C5 but I do not like the fact that unlike in VW, skoda or Audi where once you connect diagnostic tool you know what part is faulty even if its some insignificant controller buried in other part. With Citroen it seems those fault codes mean nothing other than a punter comes in with a fault in his car - lets get all his money by replacing random parts and hope that the problem will go away. It is PATHETIC that even main delaer can't fix and guarantee that what was replaced will solve the problem.