3008 Blue HDi additive level too low help needed

[3008]

Hi, I need a help.

My 3008 bluehdi activ 120cv has problems, I has alarm error of fixing the engine immediately. I did a diag it says additive level is loo, but physical it full with oelys oil.

I need to know if the problem comes from additive pump or something else? Please I need advice.

[RichardW]

Hi welcome along, I've split this off into its own thread.

Have you tried to tell it that the Eolys has been refilled? You need to do this, you can't just clear the fault code, even if the tank has been filled.

[3008]

Yes, can’t the code, but the tank it is filled

[GiveMeABreak]

I'm not sure that has translated very well.

When the Additive tank is refilled, you must inform the engine management computer (using a diagnostic tool) that the tank has been filled, because there is no physical measuring system, so it cannot detect the actual level of the fluid in the tank.

If you do not do this, the computer has no idea that you have reset the counter to zero, so will keep displaying the warning message.

[3008]

Thanks for information

[MichalW]

Hi,

Additive tank has it own managment and car ECU is another managment. In my 3008 hdi 2011 additive tank also show level of fluid separetly to car ECU. Low level of fluid is from car ECU and is based on estimation. If you are out of additive. You also should get warning message "risk of particulate filter to be blocked" . As lack of additive make regen impossible and filter getting blocked. Also your regen frequency is much higher there is all chain after lack of additive.

Cheers

Michal

[GiveMeABreak]

@MichalW: Sorry, but that's absolutely incorrect information.

1) Later diesel vehicles like the 3008 which this thread is talking about, does not have a separate DPF Eolys additive ECU. It is handled by the engine ECU.
2) There is no level sensor in the Eolys additive tank, the level is calculated by the engine ECU, and this is estimated, not physically checked.
3) The message 'Risk of Particle Filter Blocking' means just that - the particle filter is getting full and the driver should go on a drive for at least 20 minutes of minimum 40 MPH to allow regeneration to be attempted. It does not mean the additive level is low. There is a separate message for that.
4) Assisted regeneration takes place (where needed) when the exhaust gasses are at least 450°C and can be instigated by the engine ECU if required. However, these vehicles can regenerate passively when the exhaust gasses reach a high enough temperature (550 °C), without the need for assisted regeneration, once the conditions are suitable.

[MichalW]

Hi,

I don't know is this is correct or incorrect this is my experience with additive tank toping up.
Look at the amount of additive in tank.

Straight after topping up

Reading from ECU

Reading from Additive Tank

Filled tank with 12 liters of diesel,
ECU

Additive tank

Filled half tank

Additive tank

ECU,

I

As you can see we are dealing with two independent counters which are not in line with same corellation.
I'm in the middle of resolving problem of P1409 error. In my case there is other underlaying problem which causing fast DPF sooth building.
It's looks on EGR problem as soon I run actuation test "Checking the function of the EGR circuit" it trough out P1409.

Also in past I had restarted amount of additive tank without toping up. Amount in additive tank was showing 5 ml in ECU aroung 900 ml I never got any low level warning simple DPF was blocked.

Any resources how to read EGR values and how to investgate it from interface ?

Thank a lot for

P.S. I'm not expert or mechanic so please take correction if I write something wrong.

Michal

[GiveMeABreak]

So as I explained the eolys additive tank has no physical measuring device.

It knows how much it had in the tank from the factory.
This will last for a set amount of miles / KMs. How long it lasts depends on the driving conditions.
The engine ECU adds a very small amount of additive to the fuel tank whenever fuel is added, but as said it is a very small amount, so you may not see any measurable difference in the quantity of additive remaining in a short period of time with such a small amount of fuel added. I suggest you check it in a few months time.

Your diagnostic tool is presenting data as if the additive ECU is separate - which it is not, so don't think there is another ECU. It's all done by the engine ECU, but the level is only estimated based on known original known additive values, amount injected into the tank and distance travelled, as well as driving conditions.

If you have reset the additive counter without topping up the additive tank, then that's a big mistake. Doing this means the engine ECU thinks it has more additive in the tank than in reality. It also means that it will not put the 'low additive' warning up when the level would normally become too low.

When the engine ECU calculates (or thinks) that the level is getting low, it uses the information from the maintenance / service counter to determine if there is enough fluid between the trigger point and the miles / KMs before your next vehicle service is scheduled. If it thinks the fluid will run out before your next service, it will flag the warning up. In your case, if you have reset the counter without topping it up, then you could basically be running without any additive in the system. That then has consequences as the additive pump can burn out if it is dosing without any fluid.

[MichalW]

Thanks,

Regarding my problem with EGR or TURBO I will open another topic after history search as they are not related to low level of additive.

Cheers

Michal

[GiveMeABreak]

Yes, best to create a new thread on that issue Michal.