C8 Gearbox Faulty Error

[lackybandit]

Hi, getting a Gearbox Faulty error from my 06 Hdi C8, only occurs first thing in the morning, then can be reset by switching off engine and restarting, can anyone recommend a specialist or course of action, the error is a low pressure one? One gearbox specialist I rang said they would not touch it as it was a semi automatic and didn't know anyone who would apart from a main dealer, which I would rather avoid!

[Simple]

This sounds like the 2 Borg Warner 2574.16 Solenoids, it is a common problem. Please review these links:

 

http://www.citroen-owners-club.co.uk/citroen/topic/23927-help-al4-gearbox-problems/

 

http://www.citroen-owners-club.co.uk/citroen/topic/23818-c8-2003-auto-gearbox/

 

Good luck, Simple.

[lackybandit]

Thats great thanks, some very useful links there  :) Not sure that I can do it as I bought two lexias and couldnt get either to connect to my C8, worked ok on my dads C4, but not mine! But still some useful info if I have to go to the dealer...

[Simple]

For your Lexia device, you can go through this link:

 

http://www.citroen-owners-club.co.uk/citroen/topic/23435-diagbox-7xx-from-preparation-to-operation/?hl=diagbox

 

Some Citroen C8's are CAN bus. If your device is a CAN type, then you may have to solder a 10K resistor to enable communication with CAN systems. I have written about it some where on this and other forums. But ensure that you exhaust all software communications first.

 

Good luck. Simple.

[paul.h]

This topic contains links to some of the excellent topics from Simple http://www.citroen-owners-club.co.uk/citroen/topic/23278-lexia-diagbox-pp2000-topics-18102016/ It includes the one about the 10k resistor.

[lackybandit]

Some more really useful info thanks  :D , the dealer has confirmed that the solenoids are at fault, doesn't look like a too horrendous job, but the first course of action will have to be to get a working Lexia. Do you know what function the solenoids perform, am I looking at a huge failure at some point or will it just continue to be an irritation, again huge thanks for your help.

[Simple]

Yes I do, the issues and the function of the solenoids are described in detail in the PDF attached to one of the posts.

 

The pressure regulation fault code is triggered when the ECU senses a difference between the calculated pressure and the actual line pressure in the transmission. The pressure difference is caused by internal leakage. Internal leaks can be caused by mechanical wear, a leak between valve body and transmission casing, incorrect adjustment of the manual valve index spring. The most common cause however is the pressure regulation solenoid valve.

 

You want to avoid the big thuds when changing down at speed suddenly. While remote; it could cause a breakage or slippage, you are advised to deal with this issue soonest. Leaving it for now is NOT a good idea, you will end up changing them any way while having spent the past time in uncomfortable drive (if prices don't go up and nothing else breaks which may add to the bill). In the mean time, drive the car gently to avoid the big ones.

 

To be honest, other than the price of the solenoids it is not difficult if you have someone to assist you, it is only the hours.

 

Being in Ireland, I had to source them from overseas (much cheaper), I got good quality and prompt service from both:

Solenoids (2 needed) from One-Stop-Gearbox-Shop/UK: http://www.ebay.co.uk/itm/Peugeot-206-Automatic-DPO-AL4-Gearbox-Pressure-Regulator-Lock-Up-Solenoid-X2-/171708535799?hash=item27faa053f7

and

Oil (4 liters needed) from France: https://www.lubuniversal.com/huiles-moteur/827-mobil-atf-lt-71141-1-l-5055107435847.html

 

I bought the solenoids from China (@26 Euros each/free delivery), but they seemed used!! they are now available @18 Stg/free delivery from China, but I bought from the UK. they were around 95 Euro each at the dealer!!!

 

You need to setup your XS-Evolution (Lexia) VCI and try it on an other car/s, some of them do not work on Peugeot 207 Citroen C5 and some other cars. Just ensure that it can talk to a car first. Then take it from there.