P2711 Peugeot 508

[dariobrb]

Hello dear friends,

Stumbled on new problem would say with my Peugeot 508 2011 2.0 163 PS.

Strange thing started to occur, when going from 1st gear while standing i can feel something like kick and than car will move, it is not always, but sometimes.
After that while doing 120-130 km/h and when i start to deaccelerate and car shift from 6th-5h gear everything is good, but when shifting from 5th to 4th i can also feel something like kick, all other gears are fine to mention that this isnt happening every time.
Today, new thing happened, didnt drive car for about 2-3 days, started it, everything goes great until after 20 min of drive, shifting from 2nd-3rd gear is longer, after 3k rpms it changes gear to 3rd.Also kick while in 1st gear, its longer, cant describe it, previously after releasing break pedal car would kick after 0.5 sec and i could drive, but now i think its longer.
Its a long post and the grammar isnt great, sorry about that, English is not my primary language.

COde that i have is:

P2711 - Intersystems CAN
Cause: Distant
Status: Intermittent
Description: Lack of coherence between the wire information on the status of the drive train and the CAN information from the automatic gearbox

Could not find on google what is it expect that it has to do something with transmission.
Any help is appreciated!

[GiveMeABreak]

Here's the fault code description. I assume you have a fully Automatic (AM6) or Piloted Manual Gearbox.

Looks like it needs further checks on the electrical connection from the Gearbox ECU to the Engine ECU. Have you had any work done on it lately? An electrical connection / plug may have been disturbed and could be causing the intermittent / loss of data.

Fault Code:	P2711
Description of Fault:	ntersystems CAN: Incoherence between the wire information on the status of the drivetrain and the CAN information coming from the gearbox (Automatic gear box / Sequential manual gearbox). Lack of coherence between the wire information on the status of the drive train and the CAN information from the automatic gearbox.
Conditions for Fault to clear:	If the fault is still present, consult the fault readings from the gearbox ECU
Downgrade Modes whilst Fault is active:	Interruption of starting when the fault appears during the starting phase: Request for reconfiguration to put the status of the traction chain is invalid.
Symptoms:	Starting problem
Suspect Areas:	Engine management ECU (Reception of incorrect information)

[dariobrb]

Thank you for quick reply @GiveMeBreak!

Yes i have fully Automatic gearbox. Nope, i did not have any work on gearbox or wiring.
Can the weather be the problem, because now it became really cold and was raining hard for past 2-3 days so that may be an issue?
Will check later today wiring and will look for any kind of water in engine space.

Thanks again for quick reply!

[GiveMeABreak]

I would certainly check your wiring block connections for any signs of water ingress, clean them up and check for wiring breaks.

[dariobrb]

Hi GiveMeABreak,

checked for any kind of water, but there is no sign of it, also checked wiring, as much as i can see, everything seems ok. The problem is still here.
Next step is to change the oil in transmission and while doing that to check old oil if there are metal shavings in it.
Do you know if this transmission have oil filter(my guess is that it has, but i am just guessing).
Will come back when i change oil.

Thanks again for your replies.
All the best!

[GiveMeABreak]

I have put a guide here - but bear in mind you cannot fully change the oil and can only change about 3 litres of the 7 at each change. You also need Diagbox to reset the oil counter, otherwise the engine ECU will not know you have changed the oil and will not adapt it's operation as it does when new oil has been added. You also have a Euro 5 engine.

viewtopic.php?p=553039#p553039

[dariobrb]

Hi again GiveMeABreak, followed procedure and replaced the oil, did reset of the oil wear counter. Everything seems ok, so after car warmed up i tried going a little harder and got Automatic gearbox problem/error message and car was stuck in 3rd gear,when i parker and moved gear lever to P, there was harch kick when going from D to N and N to R, also R to P. Connected car to diagbox and there is error:

P0756 Gearbox hydraulic or mechanical fault
Cause: Local
Status: Permanent fault
Characterisation of the fault :Coherence on gear 2
switching on of the MIL : Yes

Does this mean gearbox is "dead" and needs replacing? Asked around and there is one guy who is doing repair of these gearboxes and the price is around 1500 euros and 1 year warranty..

[dariobrb]

Just read about solenoid for second gear,do you think that solenoid can cause this fault and put gearbox into safe mode. Alslo,how hard is it to change that solenoid?

[GiveMeABreak]

Sounds like the Hydraulic Block has had it, but could be worse. This can be the result of not changing the oil, so probably a bit late in the day now to save it. There are places that supply the hydraulic blocks though.

Fault Code:	P0756
Description of Fault:	Mechanical or hydraulic fault on 2nd gear: Coherence. Non-disengagement of one or more clutches or brakes internal to the gearbox during the requesting of the gear 2. The time of appearance of the fault code is 12 seconds, with engine running. Technical precision on the context of appearance of the fault code The following conditions have to be met: - Engine running - 2nd gear engaged - The gear lever is in position D - The oil temperature is above -20°C - Gearbox output speed higher than 250 rpm
Conditions for Fault to clear:	-
Downgrade Modes whilst Fault is active:	Stopping of the reduction of vibration when stationary Gear locked Risk of engine stalling Warnings Warning lamp MIL "SERVICE" warning lamp Sport warning lamp - Snow warning lamp Automatic or 6-speed piloted manual gearbox warning lamps (Orange PRND triangle) Display of a "-" on the fascia panel
Symptoms:	Jerking/stalling Lack of power Deactivation of the speed limiter Deactivation of the cruise control Difficult/impossible to change gear Leaks
Suspect Areas:	Complete automatic gearbox Fluid level Hydraulic valve block

[dariobrb]

Hello GiveMeABreak, just want to thank you for your assistance, know its late reply, but wanted to let you know that you were right. Hydroblock had it, i think the guy who is specialized for these types of transmissions told me that some paths are blocked and that i need to rebuild the transmission or to get new second hand one. Decided to do a full rebuild (lots of people in my area told me that this guy is the best for Aisin transmissions.), will get 1 year warranty and he is certain that transmission will do another 350.000 km with no problem if maintained correctly. So that is it, thanks one more for providing useful info!

[GiveMeABreak]

No problem, best of luck and thanks for the update.