Peugeot 407 al4 gearbox problem

[The_gladiator]

Hello
Just an update
This morning I tried the car
If the car is cold the gears not engaging at all (or slipping)1,2,3& R
After the car became hot it start to move normally with the error p0006 appearing g every few minutes but no slippage

I am waiting to receive genuine ATF from abroad and planning to change the oil and replace the 2 solenoid and cleaning the valves block

[CitroJim]

Excellent, a good course of action and here's hoping that will bring about a full resolution to the issue...

[The_gladiator]

So any idea why the gear slipping on cold and working when hot?

[CitroJim]

No, not immediately. It could be related to the viscosity of the ATF when it is cold... What was the air temperature?

I noticed today whilst doing an oil change on my Daughter's Nissan Pixo that even 5W/30 oil was very thick in the roughly 2 degrees temperature here this morning...

Your ATF may have been too thick to flow well through marginal pressure regulating valves. I believe one aspect of LT71141 is that it retains a very similar viscosity over a wide temperature range.

[The_gladiator]

Thnx Jim
Air temp about 5 c
Anyway tommorow morning I will connect lexia and get all parameters and see

[The_gladiator]

Good day
Tested the car this morning
Temp was about 15c
When cold it move forward but on reverse very weak
Tried to drive for some time
No slippage but error very frequently and gear go to limp mode

What I observed that previously before last oil change I was receiving 2 errors p0006(pressure regulation) and p0070(converter lock-up)
Now I am receiving p1167 (pressure regulation) only.

Here some pix

[The_gladiator]

Good day
Just to close the topic i hadchanged the gearbox and the car back to normal
As I see the repair is costly and nothing confirmed

Thank for help