Renault Clio 172 Will Not Start

Renault Clio 172 will not start.
Possible Immobilizer fault.

[@TheDuckQuackers]

recently car was in crash nothing major just body work but driver seat airbag went off so iv put a seat from a 5 door clio into my 3 door clio .... and i have a knew airbag ecu module to be fitted but have not fitted it yet ... with the knew seat i still have airbag light and serv light come on ..... but what my problem is my car wont start before i had no problems i go to turn the key into second position and the immobiliser light stays steady red so when i bypass that and make it go if i go try again it just does it again aswell as clock reset and dash board read out mpg and how many miles since last reset but if i attach jump leads and bypass the immobiliser it starts first time and if the engine cuts out i am able to start the car from the ignition its only when i leave it over night and go try and start it does immobiliser stay red again and i have to bypass and reset clock

[@oanalowrider]

For all with this kind of problem, RED LIGHT ON PERMANENT (NOT FLASHING!!!) ... it`s not an immo problem, it`s not a crank shaft sensor problem, it`s most likely the wiring loom or the connection between the ECU and the UHC (transponder) ... i have a 2005 Renault Kangoo Express Series I - i did the immo bypass when the red light started flashing (it means he doesn't recognise the key anymore), the car worked fine for 2 years almost, never had a problem with the start ... until 1 month ago when i had this exact same problem - RED LIGHT IS ALWAYS ON after you turn the key in the second position - 100% of the times the car doesn't start. The moment the Red Light Sensor is off the car will start 100% of the time ... as my model is quite old the computer doesn`t block the ignition and i can hear the alternator turning as it fails to start ... so it MUST be a problem with electrical wiring. Also, the moments when the RED LIGHT IS ALWAYS ON are completely random. Once the engine starts, if you don't stop it it will work completely normal, and it may also start 10 times more with no problem but then, completely random the RED LIGHT STAYS ON and the start is blocked for some reason. By the Way, as i wrote this the car is in the alley with the same problem. Still not fixed, need to check all the wires and connectors. Don`t go to the garage with such problem if you don`t want to pay half of the car`s price for the fix. PS - it`s not the start relay also ... there is a cubical relay under the hood, next to 2-3 more that are bigger in size (depends on the model) , some may suggest to change that with a new one. Did that, 50 euro for a small relay and nothing changed.

[@kaneknight6654]

If anyone has this problem turn the key to position 2 hold down the button back to position one whilst still holding the button then try start 👍

[@NigelJames87]

Hi Kane, this may work for others having starting issues so thanks for the advice, it may help someone. In my case I had tried this method and it did not work for me, I had a break in the wiring loom, the ecu recognised the issue and prevents you from starting the car until the break in the wiring loom was fixed. The ecu will not be happy if it can not communicate with components and sensors due to wiring loom breaks or corrosion. This is what I learned after months of pain.

[@JochenSmann]

Hi Nigel, I have the same problem since yesterday on a clio sport from 2001, it will not start, battery is full working. What was your solution for this problem. Many thanks

[@chrisdavies7325]

Hi, I've got the same problem with my 182, can you remember where the wire was damaged? Cheers

[@den.staar124]

Bij mij ga ik de remlichtschakelaar vervangen. Dat is een dubbelpolige, voor de remlichten en het aanslaan of starten van de motor. En was ook de uitkomst van het uitleesapparaat, je pomp geeft geen brandstofdruk dan. Toevallig met mijn schoen de schakelaar geraakt en toen startte de auto wel. Eventueel kan er nog een schakelaar zitten die werkt op ingetrapt koppelingspedaal Success.

[@captaincolumbo7860]

Crankcase sensor is worth checking. I had the same issue. Take it out and clean it, if that does not work replace it it's only a cheap part. It is situated on the engine on the passengers side!!!!

[@tanjaprokopovic6174]

I'm from Serbia and I had the same problem, the power jack in the cassette is the problem, I cleaned it a bit and turned it on and off and everything worked. excellent advice

[@Dinja90]

Sta ste uradili da upali, koji konektor?

[@ionelGula]

The problem with this car is the same problem with Peugeot’s. If you bypass the immobiler, it will work until it stops working. All you need to do is to Turn the key to the on position don’t start it, hold the lock or unlock button on the key then turn it back one step and then back to the on position and start it. The light will go away. Stop bypassing the immobilizer system.

[@NigelJames87]

I had tried the method you mentioned as it was recommended to me by the guys on the Cliosport forum however it did not work for my issue. When you turn the ignition on the ECU will do certain checks, as I had a break in the wiring loom the ECU could not communicate with the sensor at the other end of the wire break, therefore the ECU check failed, the ECU will then stop the car from being started via the immobilizer i'm assuming. The issue was I was unable to bypass the immobiliser using the method you mentioned. Once the break in the wiring loom was fixed the car fired up again without issue.

[@Beguate]

my renault Clio MK2 RS had same problem. I change ECU UCH and transponder half years ago, The problem has been fixed. But now Inmobilizer does not recognize transponder...The another problem appear...

[@NigelJames87]

I sold the car to a friend who is a mechanic and he found the problem!!! Two wires from the wiring loom had split (white & purple), the wires sit above the gearbox but are covered by the black plastic wiring loom cover. Once he had reconnected the broken wires the car fired up into life. Check your wiring loom's people! Not an easy or tidy job but that was the solution here.

[@sibzilla]

Nice one. I had the same problem and it was a corroded wire, in my case following one of the red wires from the 5v fuse next to the battery. Look for disturbed wires and/or any breaks in the outer sheath where the wire underneath is no longer protected from the elements - corroded wires tend to go a bit green and even powdery. Removing the fuse box from the chassis will give you easiest access to check the most likely place for breaks, and if no luck then it’s time to start checking wires that run over the gearbox and elsewhere. Not much fun in the wet and cold when corrosion is most likely to occur.

[@guypittard1608]

Hi mate, I’d love to get in touch with this mechanic if possible. Desperate to fix the exact same issue on my Clio Ph1. Any help that you can offer would be dearly appreciated! Cheers.

[@jazmark1719]

@@guypittard1608 did you find out your problem? My Clio 172 ph1 is doing the same. It only bump starts. The relays where heavy corroded so I removed as much as possible but still no luck

[@guypittard1608]

@@jazmark1719 just had the immobiliser bypassed for £150.00 lol. May be a different issue for you though

[@greedycobra1446]

I had the same break in the loom , same place as you ! Defo worth a check people !

[@rafikzouabi3325]

Bonjour, avez-vous été en mesure de résoudre ce problème? J'ai le même problème et je l'ai remplacé le calculateur , mais parfois le problème est toujours là. La lumière rouge du cercle reste allumé et la voiture ne démarre pas.svp aidez moi qu'est ce que je fais ? lorsque je tourne le clef il ya un vibration au niveau des relets

[@mohamedlatrach9224]

Ta trouvé c t quoi stp

[@rafikzouabi3325]

Hello, have you been able to fix? I have the same problem and I replaced the cranksfat (160£) and the UCH (420£) but sometimes the problem is still there. The circle red light stays on and the car doesn't start. I took my car at service to fix it, but they were not able

[@orlandopalestina635]

Que tal me puedes información sobre bypass para el Renault soy de México

[@caolanfuller9428]

did you get this problem fixed I have the exact same problem and I'm desperate for an answer as my mechanic can't fix it, please help!!

[@zeekay6876]

I spend £450 its still not fixed

[@guypittard1608]

Did you find a solution Caolan? I’m desperate to find a UK mechanic that can fix it

[@jarolinful]

Hi i had same problem changed engine loom and car working like new

[@julianalexander1306]

leave the ignition on for 10 min. the key will code itself then start

[@oanalowrider]

nope. it`s not a immo issue ... i have this problem for a month on my renault kangoo express , with bypass immo procedure done, it starts completely random and 100% when the red light is ON it doesn't start . Went to 3 different garages and no one could fix it. As i type this the car is in the back yard doing the same thing.

[@bmarcelogp]

@@oanalowrider how you make de bypass?

[@DanielJopQ]

Its your CPS ( Crankshaft Position Sensor), there is a TSB on it, new sensor will come with a new plug. Easy to fix

[@oanalowrider]

nope. checked that also. The start is completely random and the cars starts 100% when the red light is NOT ON , and can`t start 100% if the red light is ON like in the vid. I tryed, new battery, crank shaft pos sensor, start plugs that were old, immo is bypassed can use any key to start ... but the car doesn't start with the red light ON.

[@kablo8430]

I wanted to like this vid but it's on 172 so I can't 😂

[@DamoDrives]

Got the fix for this but no idea why it does it because my 172 does the same. Key in to position 1, hold down the fob button and turn to position 2, let go off the fob button and turn it back to position 1, turn to position 2 (the light should go off) and it should start. It something to do with the control unit for the immobiliser (I think) sometimes wiggling the wires under the passenger seat sorts it as well. Not sure it's a problem with the key especially if if the fob works. My fob does not work (loose solder on the circuit board) but also have other electrical issues, central locking does not work, rear indicator some times works, abs and airbag light flashes under hard acceleration (but only sometimes)

[@leesharky7099]

this works cheers washed my ph2 172 today an bugger wudnt restart and head lights coming on but not switched on lol

[@DamoDrives]

That will be an earthing issue as someone said below (had this as well) the most likely place for this is 1 of the rear light clusters. Start with the rear drivers side. Take the rear light unit off and discount the power block thing from the light. Look inside the male and female parts of the plug and make sure it is not rusty (the last pin on mine was really bad) get some sand paper and remove any rust. Check both sides. If that does not work there are a bunch of wires under the passenger seat make sure they are all connected and not damaged (give them a wiggle - yes that technical )

[@leesharky7099]

kool beans ill have a looky after work thanks

[@georgestobbs6128]

MotorSport & Dream Cars

[@sgy2659]

The common problems on this car is the imobillizer.The ecu unit doesn't recognize the key(Cip Reading)..all you can do and cheaper and faster to fix it...call the van mecanic were for 75 pound will copy the key and will work 100%..i've done mine..ECU UNIT ITS TRANSMITING THE SIGNAL TO START..AND WILL NOT START BCS OF THE RED LIGHTS IS ON.HOPE MY POST WILL HELP!

[@andrewrussell5944]

I've got the same problem anybody know what the issue is?

[@NigelJames87]

andrew russell check your wiring loom cables for breaks and splits. If you can't do this yourself have a car mechanic or garage do it for you. That was the fix for my car in this video.

[@dmitry8732]

look "MB"

[@pantera935]

Hello did You fixed Your problem? thank You for andwere

[@zeekay6876]

Its happening with me crank sensor i changed 4 times but how i start in revers gear 70% cluth i hold n them i try to start as i switch the egnition on then same time pump ur clutch speedy it ll start

[@rafikzouabi3325]

d' après l'image j'ai la même pb svp aidez moi qu' est ce que je fais ssssssssssssvp

[@Remusutul]

i had this issue today, the UCH fuse was blown due to the fuel pump. 1.5 dci 2003

[@glotze8636]

Wo sitzt die Sicherung

[@jonesy2565]

Immobiliser or need a new key 🗝

[@oanalowrider]

nope. immo flashes the red light , it`s not permanent on.

[@gyulakovacs3628]

De

[@JoseLopez-pw7zi]

La solución es facil, yo lo puedo arreglar.

[@JoseLopez-pw7zi]

@@ista3434 speack english

[@JoseLopez-pw7zi]

@@ista3434 Çözüm kolay görünüyor yardımcı olabilirim. sorun enjeksiyon kilidi rölesinde yatıyor

[@JoseLopez-pw7zi]

@@ista3434 Motor kısmında sigorta kutusu var 3 adet küçük röle var bunlardan biri veriyor sorun ne oluyor röle pinleri sülfatlanıp yanlış kontak yapıyor aynı sorunu bende yaşadım o şekilde çözdüm.

[@user-dh3sk9nc4m]

The problem in the key The key battery is dead or moved from its place

[@jendrekk]

In this car there is no battery in key. It's oldschool peace of metal. Battery is only in remote for door lock, but have nothing to do with engine startup procedure.

[@piechum3527]

No fuel !

[@jonesy2565]

Also scrap the car, go weigh it in!!!