🇬🇧 Vauxhall Corsa 1.2 Cooling Fan Running All The Time, Engine Light on Dash, How To Repair. Opel 

5:55/9:44 Spot on for me, the radiator temperature sensor was replaced, just shy of £20 from vauxhall dealer and the fan went back to normal, not on at first ignition, and didn't stay on, but then a long, long (appeared) wait, why is it not coming back on? No worries, it's now working just fine, after a quick spin to warm the engine . Also of note, I had no MIL/check-engine dashboard warning lights and no codes found using my own OBDII device, just a fast spinning full on cooling fan! I've also replaced this week "on advice" from the web, the Radiator's resistor coil, with no joy, but only £13 wasted ( or invested, as its a new shiny part ). Happy days, so-far, thank you for the video help.

Could this sensor failing be the cause of my air con not getting cold? Have had re-has but still doesn’t work. If not, are you aware of any common faults on Corsa D with the air con?

3 years on this video is still helping people mate thank you! Struggled getting the clip back on but managed to do it without a trip to the garage, sensor was 12.90 from Motorserv. EML gone no constant fan noise very happy!!

Hi. I have a Corsa D 2011 1.2L 86hp. Recently every now and then it starts very hard with some black smoke and gas odor at the exhaust. I don't have any lights or error on the tester, but i noticed that when the engine is cold, the coolant temp reads -8, and after an 1h trip it reads 18. Outside temp was 20. The engine works fine after warmup. I put the plugs out after i tried to start it and they were black and 3 of them were wet, but this is probably because of the hard start. All of this and no error. The fan starts at high for few seconds when the engine is hot, and that's all. What do you think about this?

thought it was the thermostat to begin with, good video. Cheers!

Hi. Would I be right in thinking that once you have changed the suspected sensor that you have to reset the system (code error) on the obd for the problem to go away? I don't yet have an obd but I've changed the sensors, checked the engine cooling fuses but the fan constantly on and service light being on problems remain. Does it have to be reset before these issues disappear? Thanks.

My Corsa doing exactly the same, been to garage 3 times, he's still clueless

Hi. I've got the same problem on my Limited Edition but no engine management light showing. I was thinking about buying a code reader but will it still show a fault code if the EML isn't lit up? Thanks!

I think this is the problem on my Wife's Corsa D 1.4, the fan runs all the time. Only difference is no EML on. I'm going to scan it when I get back to work, but I suspect it's going to be that sensor.

Hi just need your advice. I’ve a Vauxhall corsa 1.4 petrol Auto 2017. It does not show temperature at all while I drive but if the engine running at one place it shows temperature then I start driving the temperature digits disappear. Any advise please?

Hi mate. I've currently got this issue and your video has helped me alot. Do you have a link to where you bought this sensor?

Excellent videos, can you help with Corsa D .1.4 petrol. just had new water pump and new thermostat fitted. drove for two days spanner warning light plus temperature light flashing red. on observation expansion tank was empty (no water) heard hissing noise back left of engine? let the car cool down / topped expansion tank back up / run the engine water bubbling over with the cap off fan was running? Any ideas what the issue can be please. Would really appreciate your help Regards Barry.

Thank you for your video mate, this fixed the problem. That's a like from me.

Hi thank you so much for this post and video. My Vauxhall vivaro van is doing exactly the same thing. Engine light on, fan runs constantly and no temp shown on the instrument panel. I will look for these sensors. I have also read that wiring can be faulty too. Thanks again man.

In the dash's 'secret' menu my coolant temperature reads perfectly fine (≈30 after startup, slowly goes up to normal running temp) but my fans are still running from start-up. Would replacing the temperature sensor like you did help it at all? I think mine is working fine?

fantastic well explained video. had the same trouble with my corsa. it was a blown 30amp square fuse under the bonnet that controls the engine cooling.

Hi, Is the sensor compatible with a 61 plate 1.2 (w/ac)..?❔🙂❔To clarify the Fan isn’t running constantly but it comes on as soon as You start the engine and its cold…You can turn the engine of pretty much straight away and the fan stays on for a minute or two then stops…I recently changed the Coolant after the Ex had been basically running it with hardly any coolant and mostly tap water if that helps to know, Cheers..!!!😩🙂

Like the video! Covers everything. In reply to some earlier comments about O ring seal on sensor. You need one. If the old one sticks inside then you can take the O ring off your new sensor and install it or - better - hook out the old one gently (I have used a paperclip, bent to make a small long handled hook) and keep the new O ring on your replacement. Question - which OBD reader did you use? I got a cheap one and it doesn't show 'pending' Diagnostic Trouble Codes (DTCs). It also is so cheap that Engine Coolant Temperature is one reading though my Astra J has 2 sensors like your Corsa.

are both the sensors the same or is the one that goes into the engine side different?

my new sensor didn't come with a retain clip and i lost the original one will it be ok without a retention clip?

The best video I have found on this issue, just wish I had found it a week ago! And the one you did about code readers. Can I please ask, does the WIFI code reader display the temperature from the radiator sensor, as well as the one in the engine? I've never used one before and have just got myself a Topdon AL500. In live data, it only shows coolant temp, no mention of rad temp. I'm not sure which sensor is faulty as fan is not on, but I do have the P004B error code.

Hi, I have an astra j 2014. My radiator fan is running on with the full speed occasionally with cold engine. Engine light not on but sometimes coming up ,service soon, message. Could you advise me pl

Hello Sir! Have this code P00B4 change the coolant radiator switch erase the code EML light still on.. shall just let the switch settle in first?

Can you help me fix my problem in aircon is not working but the air always out in the foot and wind shield..I doubt the temp knob is broken inside..can you have a video tutorials

Hiya.. Just wondering if you could tell me what yo think... So I literally have the exact same issue with my car currently- engine light on and cooling fan constantly running making for a very noisy car! But my question is, I have a 2007 Corsa D 1.6 VXR. So does this make any difference or would the issue still be as you advise on your video? And can the same method be used? TIA

Just had this with my car changed the 2 temperature sensors fan was still on. Then changed the resistor. Fan was still on. Bought a new thermostat comes complete with housing unit £17.89 of eBay stuck that in myself pure easy 3 bolts. Seems to have done the trick. My fans off. Warning light is off car running like a dream. You also have to top up coolant so buy 2-3 litres as you lose almost all of it when changing the thermostat. X

Has the Corsa d 1.2 2010 got another sensor on the water pump ? My water pumps hidden with the top plastic cover, I’ve read the other sensor may be on the right side of the engine

Hiya mate, currently having this issue with my corsa d vxr, what obd reader did you use? And how much was it?

My code reader says no codes found, when I start my Corsa d 1.2 2010, the yellow car symbol shows and fan comes on and stays on, don’t know what the Issue is but this video tells me it may be the sensor

Hello Anton my vauxhall corsa D 1.2 engine cuts off after engine heating up and my Radiator fan doesn't come on. But if I try to disconnect the sensor then fan starts running. I have been to few garages but no help. Is there any advise you would give me. Any possibilities you can fix my car. I'm based in Hounslow. Can't find any good garages around here. One of the garages deleted all my fault codes without fixing it and said my car is reset.

Changed both sensors fan still running. I noticed that when I unplugged the thermostat housing sensor the fan stopped and then started again after 30 seconds, is it worth me changing the thermostat housing?

Does the 1.0 12v have 2 temp sensors

My cooling fan is running constantly even on a cold start but instead of the engine management light, i get the car spanner/service light and no codes appearing on my obd2 reader. Any ideas ?

Hiya mate would this fix the problem on my car where it cranks but doesnt turn over first time everytime? Sometimes it just starts first time no problem.

Corsa d running ok but overheating in traffic , no temp indicator and fan didn`t cut in. Have checked fan with 12 volts and runs ok also have car with spanner light on dash. Would like your thoughts.

I cant find any sensor on my radiator..on 1.4 ..then fan is always running.but no warning light on the dash

Thanks a lot mate I have been struggling with this problem. Change the top sensor about four times and still no good. Then you told me there was one at the bottom it was that one thanks again

Well explained, I would rather do it myself than sending it to my mechanic. My Corsa C Gsi is doing the same thing, engine management light on and fan running constantly. Come month end and buy temperature sensor and replace it.

I’ve been told both the sensors are indeed the same part number ? Is this correct. Did you do a video on replacing the other sensor. Many thanks.

Ho Anton, my Astra J is doing the same. Are the coolant sensors for the engine and the radiator the same part?

I changed the sensor but the fans is still going m. Do I need to plug it in and reset it?

Hey got a diagnostic done at a garage and they told me that it was the thermostat and and lambda sensor. The engine management light was still on when I left so just wondering if I need to get it diagnosed again

Did the engine management light come back on for the lean code and manifold pressure ? They usually come up when the rocker covers get blocked

Why the symbol yellow car and a spanner remains on then if the fan sorted out?

Hey this is a great video explaining things. I have the exact same issue with my Mokka X I previously changed the thermostat sensor so do you think it’s the radiator sensor that needs changing ?

Lovly

hi , if the cooling fan is not working all time what is a problem? which fuse can i check ?or what can i do to check ?

I've got same problem with fan but no fault codes at all... Will it still be the sensor? I've ordered one regardless n will change tomorrow...

hello, in my corsa 2013 the electro radiator fan turns on at 108 degrees celcius reaching a maximum of 110 degrees, is that normal in a corsa? What is the normal temperature in these cars?

Hi does the rubber black ring need to remain on the sensor? The coolant seems to be leaking from the sensor.

Great video Anton. Would love to see how to change the auxiliary belt on this vehicle. Would be great!.

Can you do a video of Corsa 1.2 2010 MAP sensor I know it’s on the rear inlet manifold but can’t see it anywhere

Hi, I have a Corsa energy 1.2 the temperature light flashes and the service light stays on it turns over but doesn't start any ideas? Thanks

I have got this problem myself.. radiator fan constantly running and seems to be using too much fuel ... I have just changed BOTH sensors and fan is still on !? HELP

Hi Anton, i had code P0019 ECT Temp Sensor Intermittent and no indication on dash of temp. Changed the ECT on engine and now have P0118 (ECT Sensor 1 High Circuit), still no temp indication and now fan is running all the time. All this 3 days after i replaced the flat battery. Any ideas? Edit - just been out again and radiator fan isn't on now. Still no temp indication. (Corsa E 1.2 petrol 2015)

Just wondering if its the temp sensor on my corsa 2003 .. my car started over heating , then realised when i turned the engine off and walked round to the front of car that the fans were still blowing .. im not very technical so any help would be really appreciated thanks

Had ours replaced, also needed a new water pump and rear passenger bushes... ended up costing £700 😢. Vauxhall dealer

Thank you !!! My car is running perfectly again. Spot on video in every single detail. And thanks for the explanation at the end. Cheers!

Saved the Day! It was the sensor engine for me.

Coolant temperature changed and light stays on and fan runs all the time does that mean it’s the second radiator sensor ?

Brilliant. Would I need bleed Coolant system done cold ?

Thanks …👍👍👍

Great video, very useful info, cheers

Are both the sensors the same or do they have different part numbers ?

nice one

Hi I have the opposite problem on my 2010 Corsa where the cooling fan doesn’t turn on. I watched another vid on RU-vid which shows how to check if the fan does work and mine does. Any idea what you think it might be?

no codes on reader

My fan kicks in at 109 degrees ?! Its to late cause the coulant is cooking No error codes ... what could be wrong ?!

Hi can you send a link to the code reader when you a chance please. I didn't see it in your description.

Hi, my fan is on, no codes, the eml light isn’t on but the car and spanner light is, any ideas

Seemingly theres another coolant sensor on the block, do you know where it is