Engine fault warning triangle

[tgah]

As Pedronicus said I’ve found the additive container under the car by the fuel tank. After a bit of internet searching it appears to be easily refilled via a short pipe and contains a tank of solution a pump and a thermistor based low level sensor. It connects to its own dedicated ecu (I think inside the car on the inner sill behind the drivers seat, yet to be investigated) the ecu also connects to a sensor on the fuel cap and communicates over canbus to the bsi/injection ecu. It adds the additive as and when directly into the fuel tank! Daft question but why isn’t this additive already in the diesel at the fuel station if it’s only added into the fuel tank or am I missing something?

[Pedronicus]

Two things:

1. Be sure you wear protective gloves and goggles when you remove and/or refill the tank.

2. The system automatically adds a measured dose to the fuel tank each time the fuel filler cap is opened. One reason why you should always fill the tank to the brim rather than just a tenners worth each time as this wastes the fluid and causes the container to empty quicker.

[cancunia]

My understanding of the DPF additives, happy to be corrected...

1, Eolys
This is a catalyst that raises the exhaust temperature during DPF regen, it is only injected into the exhaust at regen time, so it lasts many tens of thousands of miles. It's in a tank somewhere underneath near the rear and costs about £100 to refill

2, Adblu
This is an additive that gets added in small amounts to the diesel tank via a small tank that can be easily topped up. The additive is added every time the filler cap is closed which is why it's best to fill up.

Eolys was used on early DPF engines, then Adblu came later, not sure of dates.

[tgah]

That’s my understanding too. But reading online people say the eolys is added to the fuel tank (and it makes sense as it’s mounted close beside it) I would expect it to be injected up stream of the DPF but as that’s at the front of the car wouldn’t it be sensible to fit the additive tank in the engine bay?

[Pedronicus]

My understanding of the DPF additives, happy to be corrected...

1, Eolys
This is a catalyst that raises the exhaust temperature during DPF regen, it is only injected into the exhaust at regen time, so it lasts many tens of thousands of miles. It's in a tank somewhere underneath near the rear and costs about £100 to refill

2, Adblu
This is an additive that gets added in small amounts to the diesel tank via a small tank that can be easily topped up. The additive is added every time the filler cap is closed which is why it's best to fill up.

Eolys was used on early DPF engines, then Adblu came later, not sure of dates.

Not strictly correct, dear chap.  The Adblue is designed to reduce the NOx content of the exhaust gasses and is injected into the exhaust system when required by the NOx sensor.  https://www.youtube.com/watch?v=gzqOXVLyfEc

Eolys is added to the fuel tank in measured doses each time the fuel filler cap is opened.  This then assists the DPF in regeneration as and when necessary. https://www.hypermiler.co.uk/dpf-diesel-...cus-mondeo

[cancunia]

That’s my understanding too. But reading online people say the eolys is added to the fuel tank (and it makes sense as it’s mounted close beside it) I would expect it to be injected up stream of the DPF but as that’s at the front of the car wouldn’t it be sensible to fit the additive tank in the engine bay?

Maybe it goes into the fuel pipe? But TBH, I have no idea.

Looks like the Eolys actually causes the soot in the DPF to burn off at a lower temperature than it would normally, that plus the higher exhaust temperature is what enables the DPF to Regen.

"Active regeneration occurs when the soot reaches a pre-determined level. Depending on the vehicle model, the ECU makes small adjustments to the fuel injection timing to increase the exhaust gas temperature, burning off the soot. Some vehicle manufacture’s, notably Peugeot / Citreon / Ford use a fuel-borne catalyst called ‘EOLYS’ fluid, which is added to the diesel during fuelling. This fluid enables the trapped particles to be burnt at a lower light-off temperature."

[cancunia]

Back on topic...

I thought the DPF regen & additive messages were displayed on the central display, something like 'Anti Pollution Warning' or similar. The problem with OBD codes is that they are generic, in order to better understand what's going on, it may be useful to see what a Diagbox scan comes up with.

[Pedronicus]

Interesting page here which may give an insight for the OP's vehicle going into limp mode.  https://frenchcarforum.co.uk/forum/viewt...hp?t=62263