2008 C5 2.2 Fuel Rail Sensor

[rednose66]

I'm hoping someone can help me. My car started developing a depollution fault about two years ago. Occasionally on long trips it would cut out. A local specialist, connected the car up, and told me it could be the fuel rail sensor. As it was intermittent I haven't really worried about it until last night. It has now started cutting out every few miles. I can still clear the codes and carry on but it does the same again a few miles on.

 

I'm using Torque on my phone and in addition to the usual alarm - fuel rail pressure etc - I'm now also getting a "major fuel leak" alert. I've checked and can't see any leaks.

 

So after the above I'm going to try changing the sensor. A few questions. I'm looking at second have sensors on eBay. How can I identify what the part number is that I need?

 

Secondly, can I just swap the sensor out? Our chi I need to get someone with Lexia to assist.

 

Many thanks!

[Rookie2]

Hi

 

Might be worth having a read of this first.

 

https://www.frenchcarforum.co.uk/forum/viewtopic.php?t=30048

[paul.h]

Is your car the 2004 to 2008 or 2008 on C5 ?

 

You can see the parts diagrams if you register on service.citroen as another professional non emergency services and as a member of the Citroen Owners Club. Once on the parts diagrams use your VIN (VIS) top left to find your car. The fuel pressure sensor can then be found under Mechanical, Engine, Air and Fuel supply, Inj calculator sensor. I think it is part 23 on the diagram for a 2004 to 2008 C5 and also for a 2008 on C5 2.2 hdi - with Citroen part no. 1920LJ (you should check this using your VIN). As an example http://www.ebay.co.uk/itm/NEW-GENUINE-BOSCH-FUEL-PRESSURE-SENSOR-0281002919-LROVER-2-2TD4-CITROEN-PEUGEOT-/152392406387?hash=item237b4b9573

 

Note that Citroen's procedures say the pressure sensor is part of the fuel rail and can not be separated so a new fuel rail is needed - I am not sure about this but in the parts diagrams it looks this way for the 2.0 hdi whereas for the 2.2 hdi the sensor is a separate part. There is no mention of a diagnostic after replacing the fuel rail.

 

Since it looks as if a new one is over £100 it would pay to confirm it is faulty by using a code reader with live data to see what the sensor is giving whilst the car is being used. Also if a fault code has been stored there will be freeze frame data also stored at the time of the fault which should be able to give you the pressure. So next time it happens do not delete the fault code until the data has been looked at.

[coastline taxis]

Think your clue here is "  major fuel leak"  When was the fuel filter last changed. Also a multi meter will tell you if the pressure sensor is working or not before you waste money buying a new one. If you haven't got a multi meter then any auto electrics should be able to check it in situ for you and really only takes about 3 minutes to check so cost should be low ( we do it for a packet of biscuits).  The trouble with ignoring pollution faults iis that they can clog your dpf filter up which in turn stops the engine from getting rid of spent gases 

[rednose66]

Guys many thanks for your suggestions. I took the car into the local specialists and they cleared all of the codes after having read them. I was told to drive it over the weekend and take it back tomorrow for them to reread the codes. They have mentioned that despite the issue appearing to be the fuel rail sensor it could also be the DPF or the EGR that need looking at. Again many thanks for your suggestions.

[paul.h]

When the codes are read again also get the freeze frame data before they are deleted and you could also post the codes and data on here.