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Technical Questions
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Brake Fluid explained  Brake fluid... Bit of a mystery topic!To help dispel some myths and for some good solid general info[more ...] By oilman  On Mon Dec 13 2010, 07:32am
3 6385 kipper
Thu Mar 22 2012, 07:47am
Sticky Thread
[Sticky]
MOT Test 2012 changes  There has been lots of discussion as to what will and won't be required from 2012 so if you want the[more ...] By Dave_Retired.  On Wed Oct 26 2011, 03:54am
1 6726 PentlandC4
Tue Jan 03 2012, 03:02pm
Sticky Thread
[Sticky]
Aftermarket HID headlamps. What you need to know. July 07  HID = High Intensity Discharge, commonly known as Xenon, headlights.From the Dept for Transport, Dec[more ...] By BigJohnD  On Wed Jul 25 2007, 10:24am
3 8096 Dave_Retired.
Thu Feb 03 2011, 01:49am
Sticky Thread
[Sticky]
The Definitive Biodiesel Guide for your C4  According to Citroen Sustainable Development Team as of September 2008, this is the guidance for run[more ...] By firebee  On Fri Sep 05 2008, 07:12am
13 10501 routemaster1
Sat Feb 20 2010, 11:31am
Closed Sticky Thread
[Sticky]
EGS Gearbox Classification  I have spoken to DVLA (both Swansea and London) and neither organisation is sure how to classify the[more ...] By blueclouduk  On Wed May 07 2008, 05:05am
3 8005 The Lyonator
Mon Dec 08 2008, 03:27pm
 Forum Threads
C4 VTR 2006 2.0i sensor location LHD  Hi all,My very first post in this forum, recently being the proud owner of a VTR. I have started t[more ...] By Finnmats  On Fri Aug 09 2019, 09:10am
None 66 -
C4 2007 1.6 HDI EGS gearbox problems.  My first post here. I have a 2007 C4 that has done about 240.000km.I have had some problems with the[more ...] By sm7tjc  On Sat Jul 27 2019, 06:35am
2 153 sm7tjc
Thu Aug 01 2019, 06:48am
C4 1.6 HDI 2006 Air filter box  Hello, I want to ask, is there any particular reason why the air filter box to be behind the engine?[more ...] By Kangiev  On Fri Jul 26 2019, 07:02am
1 124 rusky
Fri Jul 26 2019, 09:05am
No New Posts on Popular Thread
C4 HDi Oil in air intake pipe, normal?  Wonder if anyone could perhaps enlighten me to something which I've noticed on my VTR+ 1.6 Hdi. It h[more ...] By rowls  On Thu Apr 28 2011, 02:10pm
Goto page: [ 1 2 ]
20 39746 Kangiev
Fri Jul 26 2019, 07:04am
Citroen C4 Grand Picasso 2008  Hi I'm new new to this and new to having a Citroen C4 Grand Picasso 2008 . I had all these faults co[more ...] By Scarfinc81  On Sun Jul 21 2019, 10:34am
1 140 iscom
Sun Jul 21 2019, 11:40am
9649846780 Alternator help (C4 GRAND PICASSO)  Hi all. First time posting here so hopefully I can get the answers I need. I have an alternator from[more ...] By Hrp81134  On Thu Jun 27 2019, 11:47pm
2 208 Hrp81134
Fri Jun 28 2019, 01:03am
Dual Mass Flywheel - how to assess condition  Hi, my 2005 c4 needs replacement clutch - i've pulled the clutch out and found the flywheel to be in[more ...] By shanowells  On Wed Jun 26 2019, 01:01am
None 206 -
C4 Coupe RPO code from VIN PLEASE  Hi all i have a C4 vts 2.0 hdi lots of little issues most i think i can sort i also have a lexia 3 s[more ...] By Adept12  On Sun Jun 23 2019, 08:51am
1 204 BigJohnD
Mon Jun 24 2019, 04:59am
2005 C4 Hdi 1.6l changing clutch - separating transmission from engine  Hii'm replacing clutch in 2005 C4 Hdi 1.6l. Have finally removed start motor, clutch slave, etc etc[more ...] By shanowells  On Thu Jun 06 2019, 10:17pm
1 248 SteveWalsh
Sat Jun 08 2019, 01:07am
error messages  My 2012 C4 Picasso has done 26,000 miles.on a recent trip, I got a message, and 3 beepwarning that m[more ...] By lorryload  On Tue Jun 04 2019, 04:03am
1 223 Magistrate
Tue Jun 04 2019, 08:12am
Can we have 2 remote high-frequency keys in use (synchronized) simultaneously?  Hi,I hope someone can help me clarifying if this is a technical limitation or if am I doing somethin[more ...] By silmarx  On Tue May 21 2019, 09:36am
4 299 silmarx
Sun May 26 2019, 01:25am
ECU  I have a 58 plate C4 VTR+ 1.6 petrol and I was wondering if anyone had heard of the ECU shutting dow[more ...] By Jim117  On Sun May 12 2019, 02:49pm
3 341 Doo
Wed May 22 2019, 04:23pm
My C4 has started randomly "nudging" itself  So I own 2006 5 door hatchback, 1.6 HDi, semi-automaticLately it has started kinda nudging itself on[more ...] By Madagar  On Fri Feb 08 2019, 08:24am
5 711 Doo
Tue May 21 2019, 02:57pm
Whistling / Squealing Noise With Engine Speed  Hi AllNewbie Citroen owner in need of some advice / comments that have regarding an issue that has o[more ...] By bigshorty  On Thu May 16 2019, 03:10am
2 276 bigshorty
Thu May 16 2019, 10:17am
Warning beeper  HiCan anybody advise me has to where the warning beep comes from on a 2005 C4 hatch, mine seems to b[more ...] By scurt2  On Mon May 06 2019, 08:51am
2 296 scurt2
Mon May 06 2019, 01:48pm
C4 HDi 2006 Hatch Rear Wheel Bearings/Rotor  Hi guys hope you’re all well, haven’t had the need to be around much, which is a good thing I need [more ...] By Mathy  On Sun Apr 28 2019, 08:07pm
6 409 BigJohnD
Thu May 02 2019, 04:18pm
Rear axle bushes needed?  Both my rear wheels are leaning inbord, it's my first C4 hatchback but I know Saxo's like the back o[more ...] By Slevan7  On Sat Apr 27 2019, 05:13pm
None 292 -
Low boost....  5 psi is all I'm getting.So quick question..How does it work. 1.6 HDI. Seems to be a turbo unit, and[more ...] By Flateric999  On Mon Apr 22 2019, 04:29am
None 309 -
C4 Hatch 2005 Electrical  Hi all Wife has a 2005 1.6HDI C4, There is a problem with the headlight dip/main beam switch and wip[more ...] By SteveWalsh  On Sat Apr 06 2019, 06:00am
1 395 SteveWalsh
Sat Apr 20 2019, 12:45pm
SMEG5 updates  Hello all, Had my C4 Picasso on a (14 plate) for over a year now .I bought and installed sat nav up[more ...] By billboi  On Thu Apr 04 2019, 11:22am
None 354 -
Weird problem with alternator belt and tensioner.  Hi. Need some expertise opinion. Was driving along the highway. The alternator belt came off. When h[more ...] By SuperMajinBuu  On Wed Apr 03 2019, 12:03pm
None 348 -
Undercar rattle when closing any door (and boot)  I have recently noticed that when I close any door on my C4 that I hear a rattle which seems to be c[more ...] By cain93  On Mon Mar 11 2019, 06:19am
None 398 -
Rear brake discs - 2007 C4 1.6HDI Coupe  Hi all,I need to replace the rear brake discs & wheel bearings on my Loeb Coupe. There are two t[more ...] By CaptainSlow  On Tue Mar 05 2019, 05:17am
2 457 CaptainSlow
Tue Mar 05 2019, 01:00pm
Michelin Pilot Sport 4S  My front tyres were mismatched when I bought my car so I decided to replace them with Michelin Pilot[more ...] By Keith  On Sat Mar 02 2019, 11:15am
2 486 Keith
Sat Mar 02 2019, 01:16pm
New Owner a few teething issues - C4 2005 1.4 Coupe  Hi allJust grabbed myself a bargain car, it's low spec I know but I love it.I've tried searching for[more ...] By RocLobsta  On Thu Feb 07 2019, 02:23pm
3 564 Magistrate
Mon Feb 11 2019, 11:29pm
Side Light Flashing With Indicator  Hi All, I wonder if you guys have any answers. My daughter has a C4 Picasso on a 08 plate with a pro[more ...] By trainspotter375  On Wed Jan 30 2019, 11:40am
None 523 -
C4 SX HDi automatic gearbox fault  Hi AllAfter some advice! I have a 56 plate C4 SX HDi auto. Been told a support bearing in the gearb[more ...] By Tazmanfizbom  On Fri Jan 25 2019, 08:58pm
2 577 BigJohnD
Sat Jan 26 2019, 05:53am
No New Posts on Popular Thread
C4 Hatch tailgate wiring  HI......... I am a new member with a 2005 5 door hatch. the car has some issues with the rear wiper[more ...] By K9Alfie  On Thu Jul 12 2012, 08:14pm
11 6906 polszka
Tue Jan 22 2019, 01:41pm
TSB relating to fitting new spark plugs in Puretech engines  I have read that Citroen issued a silent recall in July 2018 to fit new spark plugs to all Puretech [more ...] By Cylvabirch  On Wed Jan 16 2019, 10:46am
1 593 gittos
Wed Jan 16 2019, 11:11am
Would 17 inch Citroen phoenix alloys be ok on a MK4 C4 1.6 90bhp vtr+ manual ?  Hi would 17 inch Citroen phoenix alloys be ok on a MK4 C4 1.6 90bhp diesel vtr+ manual ?In terms of[more ...] By Rizwan  On Thu Jan 10 2019, 08:33pm
2 591 Rizwan
Fri Jan 11 2019, 07:26pm
No New Posts on Popular Thread
Brake switch and additional loom for C4 VTR+ with ESP/ABS warning light  Have had what appears to be a common fault with the ESP/ABS light coming on until switch off. then r[more ...] By philrad  On Mon Jun 22 2009, 11:43am
Goto page: [ 1 2 3 ]
38 22673 rusky
Mon Jan 07 2019, 12:45pm
Alternator regulator C4 2004 1.6  Has anyone changed the alternator regulator before ? Any pics or step by steps ? I'm guessing that [more ...] By maf  On Thu Jan 03 2019, 11:19am
1 623 Coliliqui
Sat Jan 05 2019, 08:10am
Abs esp error  Hi iv recently been getting abs and esp error. It's intermittent sometimes it happens couple of time[more ...] By Rizwan  On Thu Jan 03 2019, 01:47am
4 723 Rizwan
Fri Jan 04 2019, 11:23am
Eurocarparts brake switch and extension harness to solve ABS and speed control error  I have fitted one of these Eurocarparts harness extensions plus a new brake switch to try and remove[more ...] By mikeconnectuk  On Tue Aug 22 2017, 06:42am
1 1866 Rizwan
Thu Jan 03 2019, 01:49am
Re LSD and gearbox options 1.6 HDi loeb  I'm looking at buying a 1.6hdi loeb, main question is what gearbox options are there if i was lookin[more ...] By Talbotsteve  On Tue Dec 25 2018, 04:01pm
None 651 -
C4 sx 1.4 petrol LPG converted showing unstable ECU orders  I bought c4 sx 1.4 2008 LPG converted and after couple KMs it started engine stopping when I stop au[more ...] By monther032  On Fri Nov 30 2018, 03:08am
None 667 -
Short stall during warm-up  Hi,I drive a 2006 C4 1.6 HDI manual gear box.Lately I have noticed a short stall (maybe half a secon[more ...] By jokr  On Fri Nov 23 2018, 05:14am
None 639 -
C4 coupe 05 power steering problem  I seem to be having a problem with my Citroen c4 vts 05 where the power steering works for like 10 m[more ...] By hilly  On Mon Nov 19 2018, 07:07am
1 667 FakeConcern
Mon Nov 19 2018, 10:54am
C4 1.4 Petrol 2006 Surging engine + other problems  So I bought this car a little under a year ago. It was fine for about a month and started gradually [more ...] By Curtislw  On Sat Nov 10 2018, 03:02pm
None 811 -
C4 5 door hatch 1.6 petrol gearbox problem  Hi all.Magnus in Iceland here, I am new to the forum.So I green lighted the purchase of a family mem[more ...] By maggip  On Mon Nov 05 2018, 10:35am
None 789 -
EGS Calibration in Diagbox  Hello all,I just got a 2008 C4P. It was juddering at low speeds, fairly violently sometimes I though[more ...] By hazboss  On Fri Jul 27 2018, 11:24am
4 1739 rusky
Tue Oct 30 2018, 05:36pm
1.6 HDI 9HZ injector problem  Hi Folks,I have a 2006 Citroen C4 with the 1.6 HDI 110 bhp engine. VIN no is VF7LA9HZH********The ca[more ...] By TSB  On Tue Oct 30 2018, 04:57am
4 1003 TSB
Tue Oct 30 2018, 08:23am
C4 hatch 2005 2.0 HDi EGR issues  Car as per the subject.Symptoms - car is juddering when under medium acceleration. Feels like air in[more ...] By Mkaminski100  On Thu Oct 25 2018, 06:27pm
None 752 -
Electrical Experts, I need your help - A relay to delay power for 5-10s?  2005 Citroen C4 - I have had an issue with the AC blower fan not working, though the actual AC was o[more ...] By Valleriani  On Mon Oct 22 2018, 07:07am
3 924 Valleriani
Tue Oct 23 2018, 03:07pm
C4 racing steering wheel  Hi, I've just bought a 2005 C4 2.0 VTS Coupe that I'm going to convert to race spec for the MSVR TT [more ...] By Mattcortes  On Sat Oct 20 2018, 01:21pm
1 833 wozza
Tue Oct 23 2018, 10:13am
Electrical Connections (Front NS Side Light)  Hi All,Ive been tarting up my C4 Loeb for a few weeks, looking good until today. Quick check of ligh[more ...] By CalumX999  On Tue Oct 23 2018, 05:18am
None 790 -
C4 stepper motor?  Hi all,I have a 2005 C4 hatchback 2.0 tdi exclusive, it has dual climate control. I only bought the[more ...] By clarke  On Fri Jul 29 2011, 03:00pm
8 3945 Leo_Rincon
Sat Oct 13 2018, 09:56pm
'Error in communication'  Help! I bought the daughter a C4 Picasso because she said that her C3 was to small. I picked up a 20[more ...] By v10phil  On Sat Oct 13 2018, 02:02pm
None 836 -
2011 C4 GP 2.0 hdi (150bhp) EGR valve help, Where is it?  Hello, I have a 2011 C4 GP 2.0 HDI 150hb that has gone into limp mode. My cheap scanner gives the f[more ...] By RDanny  On Sun Sep 16 2018, 02:30pm
1 910 rusky
Sun Sep 16 2018, 03:14pm
Changing the clutch on my driveway 1.6HDi  Just changed the clutch on my 1.6HDi(90).... well, it took me 3 days!Luckily, I didn't need any spec[more ...] By HansZarkov  On Tue Sep 04 2018, 06:31am
4 1141 HansZarkov
Tue Sep 04 2018, 02:12pm
Engine carbon clean  Has anybody got any comments on carbon clean on 2.0HDi C4 Picasso 82.5k miles 2011 plate? By derbyshire1970  On Sun Aug 19 2018, 02:20am
1 964 looxuser
Tue Aug 21 2018, 04:56pm
Timing belt area louder after timing belt change  Hi people,I changed the timing belt on my 2010 1.4 (ET3j4) some three weeks ago. I used a febi bilst[more ...] By davemaster  On Thu May 24 2018, 01:16am
2 1203 looxuser
Tue Aug 21 2018, 04:46pm
Help with C4 parking sensor and Depollution errors  No, not the bomb. The Citroen! My mum's 2004 C4 1.6HDi VTR+ has had its "engine pollution" message o[more ...] By CaptainJack  On Tue Feb 04 2014, 08:24am
8 5349 CaptainJack
Wed Aug 15 2018, 03:04am
Navidrive RT3 2006 Citroen C4  Hi all....I'm new to here and to owning a citroen. I have a couple of problems so far that i hope m[more ...] By cmj3765  On Thu Aug 09 2018, 06:19am
None 997 -
What is this loose white connector near my pedals ?  I've only had my mk1 c4 for a few weeks now, so getting around to looking at things more carefully. [more ...] By AllEuan  On Thu Jul 12 2018, 11:36am
4 1268 riven1962
Fri Jul 20 2018, 12:56pm
Noises when idle  Hi allI have a question about noises coming from the car.When sat in idle there is this buzzing soun[more ...] By Armaghgeddon88  On Mon Jul 16 2018, 05:28am
2 1069 Armaghgeddon88
Mon Jul 16 2018, 08:50am
Abs esp module  Is anybody able to tell me if part 4542k6 or 4542k7 is a replacepmet for my Abs ecu for a 08 1.6hdi [more ...] By BigIll  On Thu Jun 28 2018, 06:31am
None 1047 -
Handbrake faulty  C4GP 2007 2l HDi, changed back pads, now coming up code 555a force sensor that I can't clear? Where [more ...] By Rab147p  On Thu Jun 14 2018, 02:38pm
1 1172 Rab147p
Fri Jun 15 2018, 10:05am
Lexia/Diagbox on 2007 C4 for TPMS?  Well I finally got Lexia up & running.Selecting the Lexia option, I was rather disappointed to s[more ...] By jaizan  On Tue May 29 2018, 02:44pm
1 1219 rusky
Tue May 29 2018, 03:25pm
Agh this is driving me crazy - DS4 washer bottle  So I bought a damaged DS4 and slowly rebuilding bit by bit. Struggling to find what the water bottle[more ...] By Thedvdmonster  On Wed Mar 28 2018, 09:32am
5 1765 Thedvdmonster
Thu Apr 19 2018, 03:13am
Direction Indicator Issue  Hi All.Need some help please.I have a 2013 C4 Picasso Exclusive Airdream and I have a Service light [more ...] By tonyvan  On Sun Apr 15 2018, 05:11pm
4 1437 tonyvan
Mon Apr 16 2018, 02:06pm
C4 2009 - ESP ECU Location  HiDoes anyone know if the ESP has a dedicated ECU ? If yes where is it located ?Thanks By CitroenZX  On Tue May 17 2016, 01:30pm
1 1901 acland
Mon Apr 16 2018, 11:27am
c4 1.4 2006 hatch coil pack error/ cuts out  hi i usualy fix my cars but this one as got me baffled, anti pollution and bleep then engine cuts ou[more ...] By carmadrob  On Sat Apr 14 2018, 01:09pm
None 1245 -
Interior lights on a VTS  HelloI've bought a used c4 VTS and interior lights (ones that light up when doors are opened, both f[more ...] By Cutac  On Sat Mar 31 2018, 02:02pm
2 1332 Cutac
Sat Mar 31 2018, 02:43pm
C4 ventilation problem  Hi. I own a 2009 hatch C4 1.4 with automatic aircon. The problem is that none of the servomotors fro[more ...] By razvanlb  On Sun Mar 25 2018, 03:51am
3 1488 razvanlb
Wed Mar 28 2018, 04:14pm
Does this look right to you? Heater/fan blower  The motor driving the fan/blower is so noisy. Not only this but i think an asthmatic could breath wi[more ...] By Arwing  On Tue Mar 20 2018, 12:16pm
4 1542 Arwing
Tue Mar 27 2018, 09:04am
Limp mode and EML dealer struggling  Hello all, I was wondering if anyone can help me and the Citroen dealership. I have a Citroen C4 pet[more ...] By Tinymartin  On Sat Mar 24 2018, 09:46am
None 1379 -
Citroen C4 VTR petrol 2005  Hi all,Currently having problems with above car (arrrgh), here goes - anti pollution fault, changed [more ...] By gazzy  On Fri Mar 23 2018, 12:57pm
None 1291 -
Fuel Smell When A.C is on  helloi have C4, 2010 1.6 Petrol.A few days ago i noticed Fuel smell when i turn on the a.c?the smell[more ...] By baselc4  On Thu Mar 22 2018, 04:35am
1 1406 rusky
Thu Mar 22 2018, 05:50pm
How to remove cables from radio  Hello I own a c4 model 2007 a want to remove the radio to install another .I removed the radio with [more ...] By Koslinx  On Sun Mar 18 2018, 07:38am
1 1490 rusky
Sun Mar 18 2018, 09:46am
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