http://c4owners.org/ The Citroen C4, C-Cactus and DS4 - everything you need to know about owning a Citroen C4 be it a Coupe, Hatch, By Loeb , C4 Picasso, Grand Picasso (all years) or DS4 en-gb Site Disclaimer | Privacy Policy | Cookie Policy |Contact Details | Car Warranty | Sitemap | RSS Feeds | C4 Insurance | Tutorials | Quick Facts | Used Car Guide | Re Call Info | Offers | Service Reviews | Technical Documents | Error Codes wozzaa@nospam.com (Wozza) wozzaa@nospam.com (Wozza) Fri, 13 Mar 2026 23:33:45 +0000 Fri, 13 Mar 2026 23:33:45 +0000 http://backend.userland.com/rss e107 (http://e107.org) hourly 1 60 http://c4owners.org/plugins/forum/forum_viewtopic.php?248726
THREE weeks ago on a very cold weekend morning (0-1C) the UREA light came on when I accelerated from traffic. Next day I topped up the tank to the max - it was only back in NOV 2025 that I topped up the tank with Adblue just before service and MOT (passed without problems) so I knew something wasn't right. Previous years I only needed to top up once.

I scanned the ECU but no fault codes at all. So for the next couple of weeks I've been trying to get the tank the register the top up by driving on motorways. Since the light came on I have driven 230ish miles and still no luck. Now the dreaded contdown warns that I have 1200 miles left until no-start.

I suspect it could be a (partially) blocked injector and not the pump otherwise there would be fault codes. What could this be? Bring car to dealers for diagnosis or just get the injector cleaned by some "DPF specialist"?]]> Duck999 Mon, 02 Mar 2026 09:05:17 +0000 http://c4owners.org/plugins/forum/forum_viewtopic.php?248726 http://c4owners.org/plugins/forum/forum_viewtopic.php?248725 Hi all!

I’ve got a bit of a long winded one here…

When I lock the car using any method everything locks.
When I unlock the car all the doors unlock apart from the drivers door.

The only way I can get the drivers door to unlock is by pressing the lock button on the key fob twice, this however locks the car but doesn’t lock the drivers door. So you can open the drivers door and it will set the alarm off.

I’m not sure where to even start with this one, any advice would be appreciated, thanks.]]> D-Monk Mon, 02 Mar 2026 05:30:46 +0000 http://c4owners.org/plugins/forum/forum_viewtopic.php?248725 http://c4owners.org/plugins/forum/forum_viewtopic.php?248723
I hope I am in the correct place for this question.

I am in the process of installing an Android Head Unit to my 2013 Citroen C4.

Is there anyway that I can connect the original Bluetooth Mic to the new head unit? I do not want to use the 3.5mm mic that came with the head unit.

I'm presuming the head unit comes with a Bluetooth Mic as well, as I am able to make/receive phonecalls, but the person on the pbone to me says it sounds like I am under water.

Any help/guidance would be appreciated.


]]> Azza Sun, 01 Mar 2026 12:16:16 +0000 http://c4owners.org/plugins/forum/forum_viewtopic.php?248723 http://c4owners.org/plugins/forum/forum_viewtopic.php?248718
U1F22-87: Fault: no communication with parking assistance ECU.
B1229-11: Parking assistance sensors supply fault-short circuit to earth.



On order to continue my trouble-shooting I am in need of the schematic/wire-diagrams. I was not able to find this for my C4 Grand Picasso inside the http://c4owners.org/download.php area.

My VIN is VF73ABHZTFJ887374]]> mywave82 Wed, 25 Feb 2026 01:25:11 +0000 http://c4owners.org/plugins/forum/forum_viewtopic.php?248718 http://c4owners.org/plugins/forum/forum_viewtopic.php?248717
I’m a new Citroen owner and new to the forum.

I have just purchased a 2022 C4 Spacetourer, but the central locking isn’t working.
When using the key fob, the lights flash and the mirrors fold in, but theres no attempt for the doors to lock - same with unlocking.

When pushing the interior locking button, I can hear what sounds like a relay clicking within the fuse board in the glove box, but theres doors don’t lock/unlock.

When using the key in the passenger door to lock, that single door will lock, but theres doors other remain open.

Any ideas would be appreciated!

Thanks,
Scott
]]> ScottT Tue, 24 Feb 2026 05:41:20 +0000 http://c4owners.org/plugins/forum/forum_viewtopic.php?248717 http://c4owners.org/plugins/forum/forum_viewtopic.php?248714 It's just turned 195,000Km on its clock this week. (~121,000miles)
I stopped getting the dealer services when it was 4 years old and warranty expired.
Local garage does oil changes, fuel filter, MOT (WoF in NZ) etc
Citroen dealers here charge twice as much, or more, as you'd pay in the UK for everything.
A hard lesson I learned when I moved here from Scotland more than a decade ago.
Most NZ folks buy Japanese/Korean cars.
I know it's due a timing belt change but I'm wondering if I just skip it and let it die of natural causes or if it's worth paying more than what the cars is probably worth 2nd hand to get its full service including belts etc.
What's the reliability of these 2014 C4 GPs even having done the recommended service parts at this age?
I'm trying to decide if the investment is worth it or not.
I had it in an Auckland Citroen specialist last year for the AdBlue tank (again!) and was told a few horror stories of stuff that typically goes wrong with them (they dont sell new cars, just service so it wasn't a sales scare 'em ploy).
It's been a great car for the 12 years I've had it, perfect for my families needs.
(AdBlue tank won't bother me any more )]]> seoras Thu, 19 Feb 2026 23:18:16 +0000 http://c4owners.org/plugins/forum/forum_viewtopic.php?248714 http://c4owners.org/plugins/forum/forum_viewtopic.php?248709
On the engine side, it comes out right behind the brake booster slightly on the right of it.

Could any of you help with this or give me a heads up on how I could run this cable? (8 AWG)]]> zKryle Sun, 15 Feb 2026 09:17:49 +0000 http://c4owners.org/plugins/forum/forum_viewtopic.php?248709 http://c4owners.org/plugins/forum/forum_viewtopic.php?248706 Belt is still in place and is in a good state, but doesn't always turn, large wheel on belt is spinning but smaller 2 wheels are not. Any ideas what my problem(s) are, Alternator or BPGA maybe? Thank you in advance.
]]> StevieB19 Mon, 09 Feb 2026 10:07:01 +0000 http://c4owners.org/plugins/forum/forum_viewtopic.php?248706 http://c4owners.org/plugins/forum/forum_viewtopic.php?248705
I have a 2017 C4GP Petrol 1.2 - the fuel flap is always open as the push-fit type spring/catch that keeps it open or allows it to close is constantly stuck in the open position. It won't stay in.

Anyone know where I could get a replacement part, and if it's an easy DIY replacement job? I've had a bit of a look and it looks like there are a couple of screws which might allow me to take out the plastic moulding and replace the catch, if I had one.

Thanks]]> dec1anm Mon, 02 Feb 2026 12:01:43 +0000 http://c4owners.org/plugins/forum/forum_viewtopic.php?248705