Volvo C30 S40 V50 CEM / Ford Focus MK2 GEM connectors fix 

I want to give this video a good thumbs-up x10000 and stick in on the first page of RU-vid. Here is my story. I have had weird electronic issues for the past 4 years of owning this vehicle. Some of them really annoying and even game-breaking, others no so much. When I first cleaned and re-attached my outside temp sensor and it started functioning properly, many of the faults disappeared but some of them remained. Difficulties to start engine, random errors on dash such as anti-skid temporarily off, anti-skid service required, ABS failure, traction control fault, radio and A/C acting up, windows not working properly. I did not give it so much attention as I should have at that time since all errors disappeared once engine started and others were not as bothersome. All that to a point where my car would just not start anymore. Happened last sunday, was driving normally for two days and 600 kms and when I took a break to quickly wash major dirt off car, it would not start at all. Tried cranking till battery died. Towed back to home, recharged battery and tried again, no positive result. Engine was cranking but not starting. Took apart throttle body, cleaned everything, double cleaned all sensors and checked if everything was in order. No result. Was ready to go and get new FPR and even thought about having blown fuel pump. By accident I happened to check your channel and look through your videos when I found this. Having nothing to loose and symptoms similar to what you mentioned (adding those that have been occurring for past years) and nothing else I could do at that point of time, I took that crap apart, cleaned everything and put it back together. Not only did it get my engine to start again, it fixed everything that has been wrong with it for whole time and car starts so much better than before. Many thanks from Estonia, my friend, and god bless you for doing what you are doing! World needs more people like you!

I just want to say thanks for making this video. My daughter came home in her 2006 S40 last night and complained about multiple issues that occurred all at the same time. The car was working fine the day before. Some of the items were: power windows and door locks not working, wipers wouldn't turn off or change speed, gas gauge not working, speedometer not working, SRS (airbag) error shown on dash, etc ... Obviously it had to be something related to the computer system since so many systems weer effected. This evening, I spent about 1 hour following the instructions on your video. After putting everything back together, the error messages were gone and all the systems worked again. I don't know if it will last forever, since the car has had some alarm system issues recently as well but we'll see. At least we were able to get the windows closed, since they had been stuck in the down position. Thanks again.

Wow. My 2007 S40 had been having electronic throttle issues and showing the red triangle and "ENGINE SERVICE URGENT" message for weeks. This (along with cleaning the connector at the accelerator pedal) has solved the problem for over a week now. I love solutions that cost only time and effort! Thank you!

Bough 08 Volvo S40 two days ago. 1750€, fleet car, excellent condition BUT random airbag fault, random power window problem, random central not locking, starting problems, random sudden acceleration. I followed your instructions and cleaned all the contacts with 6€ can of rapid drying contact cleanser. All problems gone. Thank you so much man, you saved my day!

Just want to say a massive thank you for this video, my V50 was causing all sorts of issues, going into limp mode, windscreen wipers coming on, not able to turn of, messages saying, 'Engine problems, ABS fail, brake fail, last thing that happened was engine died and would not restart, etc. Took the module out, cleaned all the contacts, car now works absolutely fine!

If you have an older Volvo and you're getting electronic problems, issues, and cryptic bulshit warning messages popping up on your Dash, then this is your likely solution. I had every issue listed here including brake warning light, pedal sensor, all gauges stopped working, check engine light, P0171, p0240, immobilizer warning, and at least 15 other warnings on my car when it started jerking around on the highway. Cleaned the CEM and every single one of them is gone. Including the check engine light. No codes and run smooth

My Volvo had misfires and later could not be started at all. I didn't want to believe it, but I tried anyway. And it actually worked. Thanks for the video, it probably saved me a big bill! 👍👍👍

Thanks for this video. I own a Ford Focus MK2 and for the last 10 days I lost central lock, wipes, alarm lights etc. Your video motivated me to try to clean the contacts on my car's GEM. It was not so hard to do it, and now everything seems to work perfect. I hope it will last! Thanks again!

This video is invaluable in resolving electrical issues with my 2009 Volvo V50. I have very little experience 'working on' cars, but this video provided all the information I needed to complete the job. Many thanks!

Easy-to-follow instructions and clear video. Most importantly this procedure completely fixed this problem on my 2010 Volvo V50, probably saving many hundreds of dollars in unnecessary parts and labor at a repair shop. And, sure enough, my drains were clogged up with debris--mainly maple tree helicopters. Thank you very much for making and posting this video.

Likely saved me thousands by doing this quick fix, thank you! My 2005 Volvo t5 v50 AWD suddenly started having multiple electrical problems: wipers stuck on, no turn signals, loss of window function, loss of lock function, alarm set off while opening hood, and gas guage failure. Cleaned with no contact cleaner safe for plastic, nylon brush, blew it out like a Nintendo cartridge and presto! Everything works again!

My Volvo V50 2.0D momentum (2006) gives abs, airbag, wipers error and the engine wouldn't start. I follow all steps of the video and it works perfectly again! Thanks!

Thank you very much for the video. This saved over 1000 € my money. The issue caused very many problems over two years since I bough V50. I decided if this don't help, I buy a new CEM. I didn't need. Now I have a very good car :).

Worked for me :D I had my wipers going constantly, airbag warning, anti skid warning, car wouldnt lock, no indicators etc etc SO MANY ISSUES. Cleaned this module and all is working correctly. Brilliant video. Thank you so much.

Great video, really appreciate the comment about removing the lower connectors second and installing them first. This fixed all the issues I was experiencing thanks.

I know your c30 streams are old, but I really appreciate them. I haven't done this yet, but I got weird CEM related errors/issues when I left work tonight after having been outside last night, something it normally doesn't get. Anyway, thanks for the stream.

This worked for me and my V50. Thank you.

Thank you so much! ❤️ This solved all my problems in my s40

Vdry good insight about removing lower connectors LAST.

Thanks. I have done this this afternoon. Good tip to take top connectors off first. I have cleaned all mine on a 2005 V50. It all looked clean, but you can't be sure. I used lots of fluid, so I am leaving over night to ensure it all dries including any residue. I pray it works again. It is very difficult working in this footwell. It would be easier for those who have a lift and can stand up to get to this unit. If after this my car still has issues, I think I will sell it as spares. It is 15 years old now, and not worth the money on even a refurb unit... I hope this will not be necessary!

Thx~ Mr fix!!! My car(VOLVO V 50)had start problem, after CEM cleaning my car is perfect~!!! Thx a lot!!

Sen nasıl bir kralsın usta sayende büyük bir beladan külfetten kurtardın. Teşekkürler kral

I have a no-comm from the SRS module in the CEM. Found white crust on terminal 30 at the SRS module. Going to try this in the morning. Thanks for posting

Thank you very much! Great video!

Thank you done this and working great for now after anti skid warning, brake malfunction warning and random windscreen wipers Cheers

Thanks for this video! I had exactly the same issues as you described and after cleaning the CEM all errors disappeared. Your video has definitely saved me the hassle of going to a dealership.

You may be my saviour! I have bought my V50 less than 2 weeks ago and really like the car but today it stranded me with no warning signs before this. I bought from a dealer and had it checked at a independent garage before purchase and got a 3 month warranty for engine and gearbox only. The issue emerged after a 1 min drive to the local shop. Came back out of said shop tried to go home and “2 new messages” appeared “Anti skid service required” and “immobiliser, try start again”. I tried to start and no crank or anything happened. Tried locking and unlocking doors and such for a few mins and 20 turns of ignition = nothing. Then the messages went away,it attempted to start and did start for about 5 seconds on very low rpm, 200 maybe then cut out and messages reappeared. Tried to start it again several hours later and messages were gone for first 2 or 3 attempts to start but it would not start and check engine light was lit up. Going to try this tomorrow. I am a complete amateur at this but your video is excellently detailed and it appears to just be a thorough cleaning and reconnect things job which might save my broke ass 🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞🤞

Thank you so much for creating this!

plain video not as much room in my s40 short wiring loom but was big help in general.. cheers

WOw. It makes sense. I fixed the horn with the same. And the garage asked over 1 thousand to fix it. Since cars have electronic circuits, they need water seal but many have not so after many years the need this service. And it is better to put also a dehumidifier small package near by to absorb the humidity.

Prob the most useful vid on yt

I love u for putting up this video

Damn I am living with this issue for years. Will give a try to this cleaning, thanks. It happens i my case when weather changes to very wet.

Thanks for the info. I did this. Had similar problems. The car also didn't start. Just cleaning the pins on the gem unit did not work unfortunately. Then I thought to open the whole unit to see the circuitboards. Around one of the connectorpins was a corrosive black damp mess. I cleaned it with lots of alcohol based Kontakt spray. Not the oily stuff. Then used some cotton swabs and a brush. There had clearly been a short circuit there. The solderpoints where almost gone. I didn't solder them again. When dry I put it back in the car and all fault codes where gone an the car started. So this non-starting happened while driving through snowy weather with lots of snow on the low part of the front windowscreen. I think the warm engine melted the snow and it somehow dripped exactly on the unit under the dashboard. I might add a plastic cover to the unit and always clean all snow and leaves from the front window drains.

thank u so much. !

Thank You

Hi I have a clutch pedal sensor signal fault which goes through the CEM Unit. Have you seen this before and is it the CEM unit itself ? The clutch sensor has been replaced

Hej, śledzę twój kanał ze względu na Volvo które posiadam ... Ale od zawsze podobała mi sie linia BMW 1 której sobie sprawiłeś . Powiedz czy jest zadowolony z przesiadki ? I czy wybrał bys jeszcze raz te auto niż Volvo ?

hi men if go ford foucs 1.6 window not working wipar not working ,,i put 2nd hand one i pogram it wiper working but looking not work ???thanks

You worked whit Volvo v50 I see and I’m wondering do you know where blinkers lights Ralay is?! I be thankful for the advice

thanks you for the great work. I have got an informative message on the dashboard says: ABS service required and ABS light on. and it goes off when I turn the engine off for a while. the car runs fine! what do you think is the issue. no error codes! 2007 volvo s40 2.4i

Just had issues with my Volvo v50 reduced engine power light on dash then cuts out , but had lack of power off and on over quite a long period, changed sensors & E G R , still no improvement, found it was to do with the E C U , but got it booked in next week for a diagnosis check , apparently its a common problem with this model , which is a bit disappointing when you think what I've paid out already , just keeping my fingers crossed 🤞 it's not too expensive.

Hi. Just came across this and I will do this cleaning since the cem is removed now. We thought it was the key not registered in the cem any longer but the key still remote locks and engages the alarm system. So it's just starting thats an issue with a message "start prevented try again" and the other messages are showing occasionally, the srs air bag message and anti skid shows up at times. It just hasn't started for 2 months now and I've been checking so many things from starter solenoid, relays and fuses in the engine bay fuse box, fuses in the drivers side between door and dashboard and those at the cem. So wish me luck. I'll try and let you know

Where did you get this cleaner spray with the brush cleaner please

hi do you no where you can get these repaired i have a st 225 ford focus 2006 tried to find and cant find anyone except very expensive people mine is not sending car to sleep so draining battery i got another one put that in does send car to sleep and every thing good except have no central locking

Hi - My 2009 C70 waterfall climate lighting only works sometimes. Do you think this might help. Thank you for the excellent tutorial on this. Have a good day!

OK my frend do u Rep the e.c.m on Volvo s60 2006

Подскажи пожалуйста реле стеклоочестителей вольво в50 где находиться

Great film - many thanks! But what about low battery problem combined with immobilizer error? So the battery was low and afer it the info appears and it's impossible to start the car. What would you advice?

Do you know what the coloured plugs going into fuse box are for so you have brown on bottom green and blue on top I can't find any info on them I have a bent pin on the brown plug on bottom

Hi do you know the little sealed box beside ecm lower down the footwell I noticed a damaged wire on mine and earth that was poorly joined i would have never noticed only because I was cleaning ecm

Awesome videos. I have Focus 2006, central locking works only when key is inserted. Does not work with remote, i have successfully educated the key. I removed the battery, and when put it back on, the remote control worked for a week and then stopped working again. Would cleaning the GEM help in this case?

My 2006 c70 has lot's of gremlins. Boot fails to open occasionally, out side temperature sensor goes haywire, roof thinks it's open, windows fail to operate on one side. I also have a p0171 code that I can't get rid of despite changing both 02 sensors cleaning maf and checking for vacuum leaks. Will cleaning my cem fix all these issues? Or would fire resolve it completely 🤔

can you do more Audi/VAG videos like the Boost/Laptimer or how to make a Costom layout for the MMI 2g/3g?

Hi my volvo s40 2008 blows hot air inside other side and other side it blows cold do you know whats broken it gives lin bus 2 and bus lin fault codes

Is there any sort of reprogramming/resetting after refitting the module ? many thanks.

Did you clean the fuse ports also?

Tried this. It did not work for me. 2006 v50.

How long this fast fix gonna last? Im just worried if its gonna come back

Hoping this is my issue too. Volvo s40 t5 2004. Thought it was my battery. Brake messages, abs messages, safety brake etc. Does it also drain the battery too? Mine only seems to start after I get these problems listed above with a jump start.

Hi there, my V50 has some issues with the climate control. The driver side does only let warm air out. I already changed the seater-heating control units and the CCM without results. Can this cause also CCM issues?

Thanks for the video!. I have the same problem in my 2011 volvo C30 (Traction, brake, no wipers control and inmobilizer etc). Would this work on a 2011 C30 Volvo? If I change the CEM for another one, would I have to do some kind of configuration? first of all, Thanks!!

My Volvo C30 D3 2011 has no response on the accelerator pedal sometimes and the car goes in to limp mode with , this error is recurrent. I have changed throttle body, accelerator pedal and socket to the accelerator pedal. Error code says lost connection with CEM. Can cleaning the connectors solve the problem?? Or is it the conncectors to ecm?

I have V50 2.4L petrol. I just started the car after a few seconds the engine shuts off and all electronics are dead, after a minute all came back to live and the car started like normal. WOuld the CEM be the problem?

Mr fix it did all same way but my car isnt working. What can be problem?

hi,to do that,do i have to disconect the batery?or just take off and clean?thanks

I get bcm-0101 and ecm-7700 on my S40 it goes into limp mode and then anti skid service required comes on too, will this be the same resolution

Hi mr.fix, I did this entire procedure, but when I reconnect the negative wire to the battery the whole thing sparks alot. Have I done something wrong?

Do this actually work and cure it completely or will it be back after 6 months??

Hi i am having problem with my valvo v60 2.0diesel no crank no start car showing u014000 lost communication with cem if you can help me please thanks

Well, i have a v50 2010, and more and more i have problems with lights popung up on my dashboard for just a second, and also radio stops working for just a second. This can happen while driving very often and sometimes i can drive for hundreds of kilometers without this happening...

Im going to try this on my v50 ,it always says TCM not communicating with the transmission

Anyone know where the leak comes from? A lot of Volvos have this issue. Mine completely corroded.

Maybi a solution of the left rear door have warning of open door when its closed , have change window motor with the controll module to to times ,and the acoutator with the window elevator and the wiring ,without a better solutions , have power in too the window motor module but not power out from this unit too the window switch of sentrallook unit , have this problem of only left rear door

Hi

Wrong battery disconnection.never disconnect "+" the first.