P1755 fault, 308 2010

[joakime]

Hello,

I have a Peugeot 308 with some transmission problems. Its the manual gearbox that they call "Automatic"
The faultcodes is P1755 wich I understand is the clutch actuator position.
Could a reset with a computer work? Can you use Lexia software you get of ebay to reset the position?
Is it very likely that the clutch and flywheel needs replacement?
What should be the first things I check?

- Thanks

[GiveMeABreak]

HI and welcome.

First thing is to pop your VIN up here so I can determine exact model and options and system you have. I'm going to move this into the Peugeot section.

[joakime]

Okey, the VIN is: VF3**************[VIN obfuscated, can be read by forum staff]

[GiveMeABreak]

Ok, I have that, just give me a second or two...

[GiveMeABreak]

Ok, so you have the 6 speed controlled manual gearbox.

The details of the fault are below - but as you can see it could be caused by any number of the areas identified below.

When these things go wrong they can be a nightmare and very expensive to rectify.
Yes, you will need Diagbox to properly interrogate it - but honestly, there's rarely any magic cure by a 'reset'.

As you can see it could be caused by any number of sensors / or the oil level, electrovalves etc.

I think you'll need to get a bit more diagnosis by somebody who knows these boxes and can methodically go through the areas one by one to try and eliminate it, but be prepared to leave your wallet open....

Fault code	P1755
After sales description of the fault code	Clutch jammed: Coherence
Description of the diagnostics	Clutch actuator fault: incorrect position in relation to the reference value
Context of appearance of the fault code	At least one of the following conditions must be fulfilled - Free wheel - engine running
Technical precision on the context of appearance of the fault code	In gear changing phase In clutch opening phase Absence of error on the clutch electrovalve and on the engine speed signal
Conditions of disappearance of the fault	After switching the ignition off and then back on
Down-grade modes if fault present	If there is a problem with opening the clutch - Automatic mode deactivated - Change of gear interrupted If there is random closing of the clutch - Emergency selection of neutral - Change of gear prohibited as long as neutral is not engaged If there is a problem operating the clutch - Emergency request for stopping of engine provided engine close to idling speed - Emergency selection of neutral - Gear change deactivated If the clutch is jammed open Opening of the clutch If there is a problem with initialisation of the closed position No back-up mode If there is a problem with opening the clutch If the vehicle has the Stop and Start system: Stop and start function deactivated If there is random closing of the clutch during the Stop and Start phase: Restarting in Stop and Start mode impossible
Switching on of the warning lamp and/or warning message (*)	"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
Main customer complaints likely	Lack of power Impossible to make the vehicle move Absence of automatic stopping of the internal combustion engine Problem with automatic restarting of the internal combustion engine Leaks
Suspect areas	Clutch position sensor pressure sensor Electrovalves Gearbox ECU Electropump Electrical harness Clutch Level of oil in the gearbox reservoir clutch release bearing Leak on the clutch control Pump

[joakime]

Thanks for reply. Will check some stuff. Does the Diagbox do everything the dealer can do?
Was just hoping not have to drop the tranny. I will do the stuff myself, but would be nice to know if there is something that is most likely to fail?. Read that people replace clutch and after some time the error comes back. Car only has 60 000km.
Anyone had this exact problem?

[GiveMeABreak]

There are plenty of issue with these boxes across PSA vehicles and most of use here advise on avoiding them like the plague - get a proper manual or a fully Auto.

Diagbox is the software and you will need a Lexia Clone VCI and of course a suitable laptop. It will work across all PSA vehicles. Support is mostly from other users as these clones are not officially sanctioned by PSA.

There are measures for depressurising the hydraulic system, and other operations - depending on what it is you are trying to do.

Have a look on C4 Owners - there is a procedure for juddering when pulling away - but not sure this is related to your error:

http://c4owners.org/plugins/faq/faq.php?0.cat.2.217

[joakime]

Thanks for info!
Has anyone had this problem themself? What has been your solution?

[GiveMeABreak]

Chefslot has had the gearbox out to do the clutch etc, so this will give you some ide as to what is involved

viewtopic.php?f=3&t=61384

And another post with more info you might find interesting.

viewtopic.php?f=3&t=61093

[Hybrid]

Well. Have exacly the same problem with 508 e-hdi EGS.

[GiveMeABreak]

Hello 'Hybrid' and welcome to the Forum. Have a look at the videos and posts linked to above, they contain lots of useful info.

[Hybrid]

Hi, thanks.
Will take a look and revert. We will read out faultcodes tomorrow. Car is almost att 200'000 km so no surprise if clutch is about to go. I Work as a High Voltage Technican for new electric cars myself so no homework on this old banger. Just checking codes.

[GiveMeABreak]

If you need help with any specific fault codes, pop your VIN up (please post your VIN in full without spaces - it will be automatically masked from public view after submitting your post & will only be visible to staff) and I can take a look for you.

[Hybrid]

Wow! Thank you. VIN VF3**************[VIN obfuscated, can be read by forum staff]

[GiveMeABreak]

So just pop up any other fault codes you need an explanation for (that have not already been provided above).

As far as P1755 goes if there is a loss of traction and this fault is present then this means there is contamination in the gear control piloting actuator.

Diagnostics must be undertaken to determine the course of action:

• Reading the fault codes first of all.
• Gearbox programming.
• Replacement of the gear control piloting actuator (if necessary).
• Replacement of the clutch bearing (if necessary).

There should be no other fault codes appearing with P1755. If there are, deal with those first. If not, the first thing to do is perform a gearbox programming sequence (using Diagbox or other professional level diagnostic tool with this capability).

If the gearbox programming does not work, the clutch stop needs to be replaced.
If the programming does work, the gearbox piloting actuator may need replacing.

But referring to the P1755 fault code table in my previous post, you can see other possibilities.