C4 Grand Picasso gearbox fault

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Nizace
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Joined: 03 May 2022, 10:05

C4 Grand Picasso gearbox fault

Post by Nizace »

Hi,
I came across this site while searching a P1218 code that the snap on tool came up with on transmission.
My issue is a gearbox fault that appears to be intermittent. My suspicion is the clutch is going.
When attempting to put the gear lever into Auto or semi auto it pauses then pops up gearbox fault, effectively refusing to select the forward gears. It always selects reverse without issue.
The fault can also appear while driving. This can happen when slowing down or while at a constant speed without changing gears.
The fault appeared after going to a garage for my MOT repairs ( front droplink and bush and a possible dry crank sensor).
A garage has tried to adjust the clutch actuator and gear selector actuator without success.
My local citroen specialist is adamant that it is the clutch going and may cost in excess of 1500 plus vat. I may also have to replace the double mass flywheel.
Does anyone have any other ideas on the cause or where to look before I replace the clutch?
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GiveMeABreak
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Re: C4 Grand Picasso gearbox fault

Post by GiveMeABreak »

Do you have your VIN, as I'm not getting a valid fault code for P1218 - so can you also confirm the code number is correct? Are you sure it is not P1208?
Nizace
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Re: C4 Grand Picasso gearbox fault

Post by Nizace »

Yeh Im sure it was 1218. The other code was a u1208. I found this forum by searching for P1218. It generally related to gear selector signal incoherence.
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GiveMeABreak
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Re: C4 Grand Picasso gearbox fault

Post by GiveMeABreak »

Yes, but codes are vehicle and system specific. So without your VIN I can't match it up or confirm if it is relevant to your specific vehicle.

Your VIN is automasked on post submission, so just type it up as only staff can see it.
Nizace
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Re: C4 Grand Picasso gearbox fault

Post by Nizace »

Vin is VF7**************[VIN obfuscated, can be read by forum staff]
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GiveMeABreak
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Re: C4 Grand Picasso gearbox fault

Post by GiveMeABreak »

As I mentioned earlier, this fault code is not being returned for this vehicle. That can be a problem with non-OEM diagnostics as they can't always read the full constructor codes. I've checked all the possible engine fault codes and also the piloted gearbox codes and it is not listed against this vehicle (DV6TED4) 110.
RichardW
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Re: C4 Grand Picasso gearbox fault

Post by RichardW »

It's probably P1718....
Nizace
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Re: C4 Grand Picasso gearbox fault

Post by Nizace »

RichardW wrote:
03 May 2022, 12:44
It's probably P1718....
Yeh thats also likely.
Ill have to borrow my mates snap on tool again and check again. The error has come and gone 6 times in the last hour. It goes when it doesn't detect it. Id expect a clutch slipping issue to be permanently on.
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Re: C4 Grand Picasso gearbox fault

Post by RichardW »

You need to get into the live data to see what it is saying about the gear selection vs the required selection, operating pressures, clutch engagement etc. Have you checked around the actuator on the front of the box that it hasn't lost oil?
Nizace
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Re: C4 Grand Picasso gearbox fault

Post by Nizace »

I asked the garage to look into it and they said they'd adjusted the actuator but not much else. Only charged me 40 so prob didnt do anything.
There is oil leaking from one area but ill have to attach a picture of it later when im back at the car. I dont believe its over the gearbox but it could be interfering with other areas.
Nizace
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Re: C4 Grand Picasso gearbox fault

Post by Nizace »

So as I'd mentioned, this is where i see the oil leak coming from. Not sure where its from or what its causing but could be an issue either way
PXL_20220504_083118340.jpg
PXL_20220504_083127278.jpg
RichardW
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Re: C4 Grand Picasso gearbox fault

Post by RichardW »

That's the turbo - if you look to the right of there past the radiator top hose you will see the actuator on the front of the gearbox.
Nizace
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Re: C4 Grand Picasso gearbox fault

Post by Nizace »

That might explain the slow uptake feeling like its in limp mode.