Few fault after scan with Diagbox

[sofnet2000]

Hello guys

I had the engine fault come up again the day before yesterday whilst driving back home on my C4 picasso 17 plate, car still drove as normal except the cruise control and loss of power, drove it few times from home to shops etc. et drove fine with engine management on and engine fault message showing at the start. however yesterday afternoon i went to start it and it wouldn't start, tried phoning Citroen and I was told earliest appointment after 28th of December, got someone to help with Diagbox on their laptops and it read quite few faults, U1F0387, U180781, U1F1A87, U1F5387, U1F3287, B180887, B171564, B171664, B172813, B100300, U1FA000, P246300, P246C00, after resetting them the car started but I did not risk driving it again fearing it might just stop breakdown somewhere.

The description of the fault on Diagbox doesn't give much information and it was in french, can anyone help? anyone had similar issues? I know some of the code are related to some issues known to me, like the drivers side mirror not folding and keyless driver's side door handle bit temperamental what confuses me is the rest of them.

Just a bit of history, I started having issues when a battery was changed by halfords technician who struggled with it and couldn't get it out and when he managed it, did not reset anything, in fact at that was the first time I had the service message appearing on the dash.

all your inputs are much appreciated.

[sofnet2000]

I am not sure how it works here? do I have to donate to get help?

[Ross_K]

Hi, if you've cleared the faults drive it around for a bit and scan it again (maybe in English this time?). There's no way of knowing from the screenshots which are historic codes and which are current. Cheers

[sofnet2000]

I have attempted forced regeneration using diagbox and now I got another fault which tells me engine oil has deteriorated, I tried clearing the codes and drove it for longer in the hope that it fixes the problem thinking the issue arrised ftom short journeys but it didn’t help.
Now with the festive period is bit difficult to get it into a garage, cittoen gave me 2 months lead in their appointment.
Can the oil quality be the issue? I serviced it 10 months ago at main dealer.
Is it safe to drive with this fault?

[MJJ_ZX6RR]

These faults all suggest to me that the car has tried multiple times, unsuccessfully, to regenerate the DPF. Given you have given it a long run, and even tried to force a regen, I would suspect the DPF pressure sensors are faulty tricking the car into thinking it always needs to regen. Every time it does this, it adds a little unburnt fuel into the oil - designed to cope with this in normal conditions - which is why you now have the oil dilution error.

I would suggest monitoring the live data values for pre and post DPF pressure, plus DPF fill level, and see if the readings make sense. It is also possible that the DPF is actually so blocked that it cannot regen, but I doubt that on a 17-plate car unless you have hundreds of thousands of miles on it or have only ever done journeys less than 10 miles in it.

An oil change soon, hopefully after solving the original problem, would be very sensible too.

Martin.

[sofnet2000]

These faults all suggest to me that the car has tried multiple times, unsuccessfully, to regenerate the DPF. Given you have given it a long run, and even tried to force a regen, I would suspect the DPF pressure sensors are faulty tricking the car into thinking it always needs to regen. Every time it does this, it adds a little unburnt fuel into the oil - designed to cope with this in normal conditions - which is why you now have the oil dilution error.

I would suggest monitoring the live data values for pre and post DPF pressure, plus DPF fill level, and see if the readings make sense. It is also possible that the DPF is actually so blocked that it cannot regen, but I doubt that on a 17-plate car unless you have hundreds of thousands of miles on it or have only ever done journeys less than 10 miles in it.

An oil change soon, hopefully after solving the original problem, would be very sensible too.

Martin.

Thanks Martin the trouble is that DPF error came on about a couple of months ago and after cleared it did not come back until end of novembre, someone suggested to me to do forced regeneration although percentage shown was only 13% in dpf, I did attempt the regeneration but unfortunately it did not go through in fact it stopped after 2 min and red message appeared on dash and engine cut off, after 5 mins I managed to restart the car and then this oil message started appearing.
Concerning the dpf pressure I was told it should be about 30mb and mine is well above that I think is over 150 mbr at 3000rpm.
Car only done 37k I am really puzzled, if I carry on driving it until I get serviced which won't be before new year, will it cause damage?

Thanks

[RichardW]

There's some info about the oil code here:
viewtopic.php?t=65261

It seems that once present regen is blocked, hence the faults with the DPF. Or maybe there are DPF problems that are causing the oil fault...

[sofnet2000]

There's some info about the oil code here:
viewtopic.php?t=65261

It seems that once present regen is blocked, hence the faults with the DPF. Or maybe there are DPF problems that are causing the oil fault...

Can I at least drive it as is until garages open?

[RichardW]

Depends how far, if it's not regenning the filter then it will block up after maybe 1000 miles sufficient to need it taking off and cleaning.

[sofnet2000]

Depends how far, if it's not regenning the filter then it will block up after maybe 1000 miles sufficient to need it taking off and cleaning.

What about the oil? Will this execive rate of dilution cause engine damage?

[sofnet2000]

a quick update, I have done a service and changed the oil, and all good no more issues, however error U1109 (comms fault with gearbox ECU) still there, any suggestions?