C5 DPF fault

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Harlequin
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Re: C5 DPF fault

Post by Harlequin »

have been told a way to defap , without permanently removing the filter itself
Simon
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Re: C5 DPF fault

Post by Harlequin »

thank you all btw - where is that ECU located?
Simon
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Re: C5 DPF fault

Post by GiveMeABreak »

It's part 20 on the diagram, so should be in the vicinity - bolted on with a Nut.
C5 Additive ECU.png
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Marc
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Re: C5 DPF fault

Post by Harlequin »

so a replacement addfap ecu has been installed and the DPX42 added to the tank, all process done for setting it

addfap ecu says ` no limit reached` woohoo

main ecu still refuses to accept it :(

how can I wipe the main ecu to remove the black permanent faults as remove faults doesn't work?
Simon
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Re: C5 DPF fault

Post by Harlequin »

and part 20 is actually in the drivers side sill!
Simon
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Re: C5 DPF fault

Post by GiveMeABreak »

Normally with the faults you have to read them first, before you can delete them. Try reading each one (actually going into the fault) then try and delete them. Glad you have got it partly working.
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Marc
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x 23

Re: C5 DPF fault

Post by Harlequin »

So , the first fault is now cleared - am left with the next 2? But , under lexia I can undo the fuel cap and lexia tells me if I take it off or not?

also how quiet is the additive injector pump?
Attachments
faults1.jpg
Simon
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2005 C5 3 Litre V6 Exclusive in Mauritius Blue and my 1997 Xantia Exclusive V6
x 23

Re: C5 DPF fault

Post by Harlequin »

So a bump - anti pollution fault came back - now cleared but I'm still left with the fuel filler cap sensor and the low additive signal. Now, lexia can tell me when I remove the capo, it goes from `present` to `absent` - so am at a loss.

as for the additive signal - could it be the cable from the dpf to the fuel tank? the additive pump hums nicely when tested to cant hear the injector
Simon
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Re: C5 DPF fault

Post by GiveMeABreak »

I can't help you with this particular one Simon, as I have a completely different system on mine without an additive ECU. I can only suggest it might be down to telling the system that a new additive ECU has been added and then doing the reset possibly...
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Marc
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2005 C5 3 Litre V6 Exclusive in Mauritius Blue and my 1997 Xantia Exclusive V6
x 23

Re: C5 DPF fault

Post by Harlequin »

Its booked into the local citroen indy (along with a few other bits) to have a look at. its frustrating as its actually beating me , especially the fuel cap as the same sensor which is faulty also tells me when the cap is removed or in place!
Simon
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C5 MK II 2.0 HDi Exclusive Obsidian Black
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XM 2.0 Turbo Prestige Emerald Green Pearlescent
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CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
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Re: C5 DPF fault

Post by GiveMeABreak »

These can all be symptoms of the BSI not talking to / recognising the additive ECU, so it's ignoring everything possibly.
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Marc
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My Cars: Xantia Activa - one day I`ll own her again! Also miss my `old` 405 GLx4
2005 C5 3 Litre V6 Exclusive in Mauritius Blue and my 1997 Xantia Exclusive V6
x 23

Re: C5 DPF fault

Post by Harlequin »

based on your previous list I`ve now bought a second hand (yes I know) replacement part number ad ecu - was ok at £20, rather than £240 that citroen want!
Simon
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GiveMeABreak
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C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5600

Re: C5 DPF fault

Post by GiveMeABreak »

Well, worth a shot at £20 - I have heard it mentioned here somewhere that these particular types seem to have an issue whenever they are reset, resulting in needing a replacement - totally nuts and and I can't think why that would be.
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Marc
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2005 C5 3 Litre V6 Exclusive in Mauritius Blue and my 1997 Xantia Exclusive V6
x 23

Re: C5 DPF fault

Post by Harlequin »

The part in the car is a 1525AS - I have ordered a 1525AZ (listed replacement part) - so *hopefully* along with using PATfluid instead of DPX42 it should be ok
Simon
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