Citroen Grand C4 Picasso 2012 MCP6 error

[Otaru]

Hi. I've been having problems with the same. I'm getting the same error codes, particularly 3 of them:

P0944
P1731
P1749

The symptoms in my car are: sometimes when starting to drive from being stopped, suddenly it's like the 1st gear disengages abruptly. Apart from that, while driving on 3rd or 4th gear, when I release the throttle, there is a noise probably coming from the gearbox, a kind of "canned" sound of something metallic. It sounds like gears are not having good contact while running.

What I have already done: I changed the gearbox oil, the activator oil, and the accumulator (black ball). Still happens

I don't know what else to do.

[ramirofiso]

I solved the problem. Currently the MCP6 gearbox is working. The problem was with hidraulic pressure holder. I had to change this part and the oil because it was very dirty and I washed the oil reservoir. Tutela cs speed is the proper oil for the activator.

Hi!I', having the same issue (same error code). Do you have the link to the video and the part number you replaced? Thanks!

[kalm007]

Hello
2461F2 this is the product number

I could not find the youtube vidoes but not so hard.

You will remove the "70" part number bolts (4 pieces If i remember right or 3) and you disconnect the oil tube and you can remove the bottom side

[ramirofiso]

Hello
2461F2 this is the product number

I could not find the youtube vidoes but not so hard.

You will remove the "70" part number bolts (4 pieces If i remember right or 3) and you disconnect the oil tube and you can remove the bottom side

Thank you so much!

My car's symptoms are basically that it takes a long time to release the clutch, especially in low gears. To avoid clutch slippage, I use it in sequence mode, so when I'm going to shift-up, I release the accelerator until the system releases the clutch, an once it's done (around 2-3 seconds) I can accelerate without problems.
I have two other error codes along with P0868:
P0949: Clutch Programming Incomplete or not carried out.
P1800: Gearbox Programming incomplete or not carried out fault.

I also have Diagbox installed so I will check the when pressure is dropping.

Any other ideas of where to start from?

Thanks again!

[kalm007]

Yes I had a problem as well. The car mechanicer replaced the clutch in the car and after that the shift was very slow and I got this same error code. I bought a diagbox with hardver and I repaired it. Currently I do not know which menu was it but where you got this error message the you can click on the repair button and you have to select the proper menu. But not so hard. You can find. The process will be automatically but end of the process you will "drag race" a little bit because of torque set. But the diagbox will write step by step

[ramirofiso]

Yes I had a problem as well. The car mechanicer replaced the clutch in the car and after that the shift was very slow and I got this same error code. I bought a diagbox with hardver and I repaired it. Currently I do not know which menu was it but where you got this error message the you can click on the repair button and you have to select the proper menu. But not so hard. You can find. The process will be automatically but end of the process you will "drag race" a little bit because of torque set. But the Diagbox will write step by step

Oh, that's interesting! So as far as I understand this is the summary of what happened to your car:

1) Replaced the Clutch
2) Shift After you replaced the clutch, the shift became to go slow
3) You had this P0868 "Low Pressure.." code
4) You replaced the Pressure Acumulator
5) You performed the Gearbox "teaching" with Diagbox

I really think that the issue that it's causing everything is the pressure loosing. So I will start by fixing that I guess..

Thanks for all your help!

[kalm007]

Yes very briefly. But these 2 errors is very different. Before the low pressure error I had P1800 error But I did not want to work on it. 1 year later I got the low pressure error. I solved this problem and during I taught the cluch.

You can check the live pressure via diagbox. So if the pressure fast down the problem is with "Accumulator"

And good proposal. If you replace the accumulator you will better off that you change the oil and clean out the oil reservoir. Because future problem.

The proper oil is Petronas tutela cs speed or Ravenoil GHA-F

[ramirofiso]

Yes very briefly. But these 2 errors is very different. Before the low pressure error I had P1800 error But I did not want to work on it. 1 year later I got the low pressure error. I solved this problem and during I taught the cluch.

You can check the live pressure via diagbox. So if the pressure fast down the problem is with "Accumulator"

And good proposal. If you replace the accumulator you will better off that you change the oil and clean out the oil reservoir. Because future problem.

The proper oil is Petronas tutela cs speed or Ravenoil GHA-F

I've tried to check the pressure live, but diagbox indicates "This ECU does not support this function" so I need to investigate further..

[kalm007]

I do not understand. I could measured the pressure in the accumulator. Do you have 9.91 version?

[ramirofiso]

I do not understand. I could measured the pressure in the accumulator. Do you have 9.91 version?

That's actually the issue maybe. I have 9.18 version. I will find the newest version and check if it works

[ramirofiso]

I've installed the 9.91 version and it kept saying that this is not supported by the ecu when I try to read the pressure sensor. Anyone else with this issue?

[kalm007]

Did you install the diagbox or did you use virtual box(virtual pc) what contained diagbox?

[ramirofiso]

Did you install the diagbox or did you use virtual box(virtual pc) what contained diagbox?

I'm using the VM that contains the 9.91 version. Is there any difference? (Also the software is not recognizing the ECU, It does recognize the gearbox "CFC300P" and all the other modules, but not the ECU)

Thanks!

[kalm007]

There is okay that you use the diagbox via virtualbox. But I have a question. When you open the diagbox. Is software recognise your car or you have to write your VIN number.

[ramirofiso]

When I open diagbox, the car is recognized automatically, I don’t have to put the VIN manually. Today I removed the lower part of the gearbox and ordered the pressure accumulator. I decided to move forward with it because I was paying attention to the hydraulic pump behavior, and it seems like it is pressurizing the system every 4-5 minutes, which means to me that the whole system is no capable of maintain the correct pressure, and that’s why I suspect the pressure accumulator is not holding it. I will let you now what happened as soon as I receive the spare part!