2015 Peugeot expert 2.0hdi P2566 Noisy on acceleration and low power.

[ImNoExpert]

Hi all, I've just replaced all the vac valves on the rear of my engine. For a while there was a leaking injector which was spewing out spent diesel/fumes/oil? and the top of the engine is black/brown with gunk which had made it's way into the vac valves that control Air Doser, Turbo and EGR circuit, as there is a vac line breather right next to where the leak was. I can't say for certain if they had failed as a result, but inside they looked gunked up so as matter of maintenance I've replaced them; alas to no real noticeable beneficial effect. But once again using my FAP Peugeot Citroen App I have fault code P2566.
My main symptoms or concerns have always been:

Lack of power especially at higher speeds or gears. Van takes about 19 seconds to get to 60 where it should take around 13. Ticking/Tapping/Farting noise while accelerating only that is not evident while stationary that is now becoming much worse.

I'm now starting to think it is the Turbo Copy sensor on tp of the turbo. It is not a serviceable item and the entire actuator must be changed.

I'm hoping someone can tell me what I should do next to confirm if it's either Injectors or Turbo or what? There has NEVER been a Fault Code on the Van itself. I've owned it since May 22 and covered 6k miles without a problem (only the symptom or low power and noise on acceleration).

I have Diagbox 7.83 and have access to live data but no idea where to start or how to interpret it.

[GiveMeABreak]

Here's the descriptor for you as it relates to this engine:

Fault Code:	P2566
Description of Fault:	Variable geometry turbocharger: Excessive drift on the last initialisations of the upper stop. Drift less than -0,5 V or greater than 0,5 V in the initialisation of the variable geometry turbocharger upper limit relative to the first initialisation. Drift less than -0,3 V or greater than 0,3 V in the initialisation of the variable geometry turbocharger upper limit, relative to the last initialisation the previous time the network (powerlatch) went to sleep. The fault immediately appears. Conditions of activation of the diagnostics: Just after the initialisation of the upper stop.
Conditions for Fault to clear:	3 successive starts, allowing time for the network to go to sleep (Power latch).
Downgrade Modes whilst Fault is active:	-
Symptoms:	Lack of power No effects immediately perceptible to the customer.
Suspect Areas:	Turbocharger: The variable geometry of the turbocharger is locked Turbocharger electrovalve Position indicator of the turbocharger Electrical harnesses Vacuum circuit

[ImNoExpert]

Thanks Marc, i have seen your input on other threads regarding this code. I'm hoping someone will drop by with an answer as to what it might actually be. Can't be my valve as I've changed, really don't think it's a vacuum, unless it's so slight i've missed it, so all I'm left with is electrical or Copy position sensor.

OR do even trust this app? Like i say, the van itself has never thrown a code.

Would be great to link the Symptoms i.e Noise to a suspect area. The noise it either blowing, or rattling, so what cold cause the noise if we point at the Copy Position or the Vacuum side?


The actuator moved, the turbo works, the van generally runs smoothly, it's just the noise and loss of power/turbo........Starting to sound quite obvious now, unless it is a failing injector.


Last week I used a bottle of REVIVE on the drive. Large deposit of oily sooty mess discharged from the turbo outlet to the CAT joint. Maybe it was stuck after all and requires more attention.

Hate this van now!

[GiveMeABreak]

As there are no downgrade modes stated, you may not notice anything - unless the fault develops or you notice that the power is a bit lacking when needed....

[ImNoExpert]

The power is definitely lacking. I don't trust it to over take, but I'm as concerned now with the noise on acceleration.

However, still no codes on the van (only the app) which tells me all sensors are working, but the mechanical side is not.....So what can appear to work, but not be functioning without throwing a code on the van and also make the loud tapping on acceleration?

I've just got a Leak of Test kit today to test the Injectors but it's smooth while stationary and revs freely so could be a Red Herring as the sound only changes on acceleration, or Load.

[ImNoExpert]

As there are no downgrade modes stated, you may not notice anything - unless the fault develops or you notice that the power is a bit lacking when needed....

Are there any specific test or Live Readings I could check using Diagbox, Marc?

[GiveMeABreak]

Have a look at the live data for the engine ECU - there are lots of tests you can select that will show live data in Diagbox.

[ImNoExpert]

Hi, @GiveMeABreak.........I'm wondering if you can make any sense of this data, or direct me to a place of info where I can make sense of it?

Still no engine light on van, but using Diagbox 7.83 now showing P2566. As I've already changed the solenoids and completed several actuator tests with nothing to report I'm now not sure what to do next.

Any help greatly appreciated. thanks.


How do i add an .mp4?

[ImNoExpert]

[ImNoExpert]

I've now got P1497 on my FAP App. Not Enough Turbo.....Light at the end of the tunnel maybe?

[GiveMeABreak]

Error Code :

Fault Code:	P1497
Description of Fault:	Variable geometry turbocharger: Position incorrect in relation to the requirement (Not enough turbocharging) (APV). Positive discrepancy above 30% detected for 6 seconds between the position reference point and the measured position of the variable geometry of the turbocharger. Conditions of activation of the diagnostics: Engine has been running for at least 6 s
Conditions for Fault to clear:	Driving with the engine hot for 5 minutes
Downgrade Modes whilst Fault is active:	-
Symptoms:	Noise Smoke from the exhaust Lack of power Loss of braking
Suspect Areas:	Turbocharger Turbocharger solenoid valve Position indicator of the turbocharger Vacuum circuit Electrical harnesses

[ImNoExpert]

Thanks Marc. I can find the fault codes on the internet, but I'm struggling for remedies and how to test the system.

I need readings and tolerances etc. Voltages etc.

As the Van is not throwing any codes, these fault codes I'm getting from the FAP app may be Red Herrings.

The turbo actuator arms moves by hand, though it's quite hard on the fingers, it's goes up and springs back with a decent amount of force. Upon starting the arms pulls and holds.


I'm starting to think this app is a little temperamental and sensitive and giving me reason to think there are problems where there are none.

I still think it's a leaking injector issue.


If you can take a look at the following info and tell me if anything stands out? Specifically the readings from the Turbo at the bottom. WOT and showing as 43%?

I'm going to assume this is only 43% Open/Closed as Off throttle it's closer to 80%. I've asked the app developer for input on how to interpret the bars.

[ImNoExpert]

FAP PEUGEOT CITROEN APP.

[ImNoExpert]

Add to this the fact the van appears to go faster the less throttle I give it.

IF there is an injector issue and a put my foot down, the ecu applies more air creating a Lean condition, if the fuel is being delivered incorrectly? But it runs very smooth while stationary and revs perfectly fine so maybe not the Injectors? lol.

Sorry, I'm close to giving up entirely.

[GiveMeABreak]

Unfortunately I don't have that sort of data for this later (DW10CD) engine and wouldn't want to provide info from a different DW10CTED4 engine as it may have a different setup.

Re the codes - they can differ from engine to engine and constructor to constructor, as they are designed to allow for that, so therefore can have different triggering conditions, values, symptoms and causes, so I always like to use the exact engine and engine ECU for members where I can.