B1811:96 Diesel fuel additive pump.

[508Allure]

Just carried out a monthly scan of my 2017 3008 1.6 HDI with 90k miles and it had B1811:96 for a fault in diesel fuel additive pump showing as intermittent, which I haven't seen before.

I did have the orange spanner symbol illuminate a few weeks ago but it had disappeared by the next start and it wasn't accompanied by a message relating to low eolys, and neither was a message present when using the check control button. I can't remember if the car was low on fuel at the time or had just been filled up.

Is this likely a developing pump fault or low fluid as I have read of owners not always receiving a low fluid warning message? I must admit I had no idea the 3008 of this generation was even fitted with a DPF additive system.

[GiveMeABreak]

Some PSA diesel vehicles have been fitted with particle filters for at least the last 24 years.

This fault code means there's low DPF Eolys additive fluid in the tank, which is why the spanner is coming up when your refuel - as this is when the additive tank is trying to dose the fuel with the correct amount and may not have enough fluid to do this.

The Eolys fluid quantity remaining in the tank is not physically measured, it is estimated. The fact that you haven't had a warning yet, about the low fluid level may be that the tank level has previously been reset to clear a warning - but has not had any fluid actually put it - this happens a lot of times by unscrupulous individuals when moving on a vehicle or to clear a code for MOTs as an example.

If this was bought second hand you may not even be aware if this has been done.

As a consequence of the additive fluid running out, then this will affect the assisted regeneration of the particle filter, and therefore lead to clogging up of the particle filter if it cannot regenerate at lower exhaust gas temperatures afforded by the additive.

So you may now have 2 issues, one that the Eolys fluid is low or empty, and secondly that the particle filter is starting to clog as it can't regenerate.

[508Allure]

Thank you Marc for the very detailed reply. I have owned plenty of diesels with DPF but not one with a DPF additive system or at least one I was aware of.

I don't suppose you would know which is the correct fluid for a 2017 3008 as I guess the next step will be to get the tank filled asap and the counter reset in the hope it's just low? I am assuming this generation of 3008 has the fixed tank rather than the additive pouch?

VIN: VF3**************[VIN obfuscated, can be read by forum staff]

I will hook up my scanner and look for some live DPF data to ascertain its health.

[508Allure]

Just took a look at the live data and it's showing the following:

Total weight of soot in particulate filter 18.523g

Total weight of additive in particulate filter 33g

Rate of clogging with cinders 34%

Additive amount in tank 263ml

Additive tank volume 1120ml

From the above I am guessing the DPF isn't clogged or at least full, the tank isn't empty and I will need a 1L refill kit as opposed to a 3L kit.

[GiveMeABreak]

Ok so you need Powerflex additive for your 3008.

I wouldn't rely on the fluid volume remaining to be honest, as this may be well off if it has been reset without actually adding anything - as I mentioned before. But certainly get a minimum of 1Lt in which is the minimum officially recommended.

Don't forget you'll need to reset the additive counter in up to 2 places using a diagnostic tool.

[508Allure]

Thanks Marc.

So can I assume my car has the fixed tank and based on the DPF info, do you think I am safe to drive it until I can get the tank refilled next week?

Don't suppose you remember the two places it will need resetting.

Thank you for the advice/info.

[GiveMeABreak]

It can vary depending on system employed on the vehicle and the model. Some have to be reset to zero and others may require the volume refilled.

The operations will be somewhere in the engine ECU menu and / or one of the other menus from the repair menu I suspect.

[508Allure]

Thank you very much.

[Jonsredpug]

Hi all
Had same issue present after a full fill a week ago. Diags report Diesel additive error, turns out she was bone dry and the pump knackered. They filled it with Eolys anyway but couldn’t clear it so I’ve instructed to order the tank&pump from Peugeot. €700+ all in
Honestly I had no idea there was a DPF additive system I figured adblue was the only additive.
Bit shocked that this isn’t maintained in regular service intervals tbh.

[LedZep]

They filled it with Eolys anyway but couldn’t clear it so I’ve instructed to order the tank&pump from Peugeot. €700+ all in
Honestly I had no idea there was a DPF additive system I figured adblue was the only additive.
Bit shocked that this isn’t maintained in regular service intervals tbh.

Same here.I figure out by accident searching for something else, when i saw in diagbox "650ml remaining in tank" which was ok atthe moment, but i filled it anyway.I suggest, if you have the knowledge or someone to do it, take a look for something cheaper such as replacing only the pump with your model specs.I saw something like this and many mechanics replace only the pump.This example is for the 308 model.Don't know the brand or the quality, but surely much cheaper solution by buying a whole tank if yours is in good condition.

https://www.franceauto.pl/en_GB/p/FAP-D ... -HDI/73592

[GiveMeABreak]

Hi all
Had same issue present after a full fill a week ago. Diags report Diesel additive error, turns out she was bone dry and the pump knackered. They filled it with Eolys anyway but couldn’t clear it so I’ve instructed to order the tank&pump from Peugeot. €700+ all in
Honestly I had no idea there was a DPF additive system I figured adblue was the only additive.
Bit shocked that this isn’t maintained in regular service intervals tbh.

These are 2 entirely different systems that do entirely different things:

• SCR: (Selective Catalytic Reduction System) treats the NOx gases in the catalytic converter by the injection or UREA (Adblue) which converts these into harmless Nitrogen and water.
• DPF / FAP: (Diesel Particulate Filter) treats the particulate matter by trapping these particles in the filter. There can be passive or assisted regeneration systems. Assisted systems use an Eolys type of additive that is injected into the fuel tank whenever diesel is added to reduce the exhaust gas temperatures needed to burn off the particulate matter.

Earlier vehicles only had the DPF system, where later vehicles had the 2 systems fitted to make them more Euro compliant.

[PC1]

I have a 2012 Citroen C4 hatchback but i am failing to locate the additive pump.

an OBD scan shows that the muiltiplexed additive pump fault