Eolys fluid & pump.

[John N]

My sisters car, Citroen C4 Picasso, currently being 'fixed' by a garage. Initial fault reading by a different garage was Adblue pump failure but the car doesn't use Adblue. I've since found out it uses Eolys fluid.
Is the pump for this a replaceable item or does it come in situ with the fuel tank? Looks like this job is going to cost her a bomb as the current garage topped up the fluid without checking the pump first. Only when they started it did they check and get the same reading as the initial garage - but this may have been down to my sister not relaying all the information.

Car has done 140,000 so not to bothered but I'd like to know more about the whole system.

Thanks.

[GiveMeABreak]

Let's ascertain exactly what you do and don't have first as these vehicles can have both systems, depending on engine and build date.

Please provide the VIN of the vehicle (it will be automatically masked by our software on submitting your post). Then I can see exactly what you have and will be in a better position to answer your question.

Eolys additive is purely for the DPF system and is a separate reservoir and pump module from the fuel tank.
Adblue is the UREA solution that is used as part of the SCR (Selective Catalytic Reduction) system, and treats the NOx. It was used on Blue HDi engines at anytime from 2013 onwards, depending on engine, model and year. This has a separate tank and is entirely separate and independent of the DPF system.

[John N]

I'll get that number as soon as possible, peeing down here and car is a couple of miles from me. I'm mostly curious as I hadn't heard of this before. My own 2016 diesel (Subaru) doesn't have anything like this, but I'm checking with the dealer when I take it in for a recall in a few weeks time.

[John N]

VF7**************[VIN obfuscated, can be read by forum staff]

[GiveMeABreak]

Hi John, ok that's great, so just to confirm you only have the DPF system fitted as you said and no SCR system.

So at 140k miles I would of expected that the additive tank would of been topped up at 70k miles, so are you aware of this or was the vehicle acquired after this mileage. In either case it would of needed a second top up by now. Further, the actual particulate filter is likely near end of life now, so would likely need a deep clean or replacement at this mileage. Normally a warning would appear to suggest the additive needs topping up or that the particle filter is at risk of clogging via a message on the display.

If the fluid is not topped up, then the additive pump can start running dry and become damaged. Ideally, knowing what the fault codes that presented would be a help for us. If you have these, please do pop them up.

[John N]

No, I'm not aware of the EOLYS being topped up. I'm pretty sure my sister bought the car at well below the mileage and so far as I'm aware it's been serviced locally ever since. The (second) garage topped up the fluid and it wouldn't run proper so I guess the pump is, as you suspect, damaged.

The original garage provided two fault codes,
P1445 : Additive adding, the quantity of additive injected into the particle emissions filter has exceeded the maximum threshold.
P1434 : Multiplex additive pump - pump fault.

[GiveMeABreak]

Ok, so here are the fault descriptors for these codes, but 140k miles is overdue for a DPF replacement under 'Normal' driving conditions. The DPF would normally be checked for clogging by Citroen at 112k miles on this vehicle with this engine as per your VIN, and then every 16k miles. The additive would normally be checked at 64k miles, then every 16k miles.

Fault Code:	P1434
Description of Fault:	Multiplexed additive pump: Pump fault. Multiplexed additive pump fault detected for 10 second.
Conditions for Fault to clear:	The following conditions have to be met: - Addition of 10 litres of fuel - Driving with the engine hot for 5 minutes
Downgrade Modes whilst Fault is active:	Transmission to the multifunction screen of "risk of clogging of the particle filter" Deactivation of the request for regeneration of the particle filter from the diagnostic tool Switching to fuel "normal reduced flow" mode Switching on of the warning lamp and/or warning message "SERVICE" warning lamp
Symptoms:	No effects immediately perceptible to the customer Absence of automatic stopping of the internal combustion engine (Vehicle equipped with "stop and start")
Suspect Areas:	Soft pouch/Particle filter additive reservoir Additive pump TI Additive pump MGI LIN

Fault Code:	P1445
Description of Fault:	Additive adding : The quantity of additive injected into the particulate emission filter has exceeded the maximum threshold. The particulate emission filter must be changed. The volume free in the particle filter is not sufficiently large. Necessary to replace the particle filter at the next service interval.
Conditions for Fault to clear:	-
Downgrade Modes whilst Fault is active:	-
Symptoms:	No effects immediately perceptible to the customer
Suspect Areas:	Particle emission filter at the end of its service life

[John N]

Many thanks. This has been most helpful. I'll let you know what the second garage does to the car etc. when we get it back. It seems that the Particle emissions filter might be at the end of it's life as well. And it might be time to call it a day.

[John N]

I will look at your donations page later, but I'm hoping to get a call to retreive the vehicle any moment.

[malc4]

Hi John, ok that's great, so just to confirm you only have the DPF system fitted as you said and no SCR system.

So at 140k miles I would of expected that the additive tank would of been topped up at 70k miles, so are you aware of this or was the vehicle acquired after this mileage. In either case it would of needed a second top up by now. Further, the actual particulate filter is likely near end of life now, so would likely need a deep clean or replacement at this mileage. Normally a warning would appear to suggest the additive needs topping up or that the particle filter is at risk of clogging via a message on the display.

If the fluid is not topped up, then the additive pump can start running dry and become damaged. Ideally, knowing what the fault codes that presented would be a help for us. If you have these, please do pop them up.

Hi Marc,
Me and my peugeot pal have same Eolys system with a DV6C engine. Similar milage ~120K with a reset (refill? or dpf replacement?) at ~70/80k but starting to get P1434/P1435.
you were saying somewhere else that additive levels are estimated and can't be trusted. was thinking Eolys may have run out with many small tank refills?

[GiveMeABreak]

Yes, the additive level is only estimated based on available data. It can go pear shaped if people reset the additive counter to get rid of the warning without actually topping up the fluid. All this serves to do is damage the additive pump leading to more expensive repairs as it can dry-run.

The only way to physically check is with Diagbox by seeing how much fluid it estimates is in the tank, then remove the tank, empty the fluid and measure it. If it's way off, then best to secure it back in place, refill it with a kit and then reset the additive counter again.

[shtu]

In a similar situation, the work I did to resolve was,

Replace the faulty tank\pump with a good used one (I tested to ensure the pump was actually faulty first).
Refilled with fluid.
Removed and cleaned the DPF.
Reset the DPF and Tank (telliing the car that it had new ones of each)

Have a nose around my posts and you'll find various threads about it. DIY it was about £150 of parts\fluids, but I have the advantage of already having diagnostics and tools to do the work, obviously a garage will be a good chunk more than that.