How VW Coolant Temperature Sensors Fail
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- čas přidán 1. 06. 2015
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Hey everybody, today we are back with another round of failed VW parts! This time we are breaking down the engine coolant temperature sensor, or ECT. You may also see this part referred to as a C.T.S. (coolant temperature sensor)..
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Join me today as we break down:
What is a VW ECT
How does a VW ECT work?
How does a VW ECT fail?
The symptoms of a failing ECT
Diagnosing a bad VW ECT
Is a VW ECT a DIY part?
and more
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Hey Charles... love your clips very informative, and doesn't treat us like dummies. Having issues with a New Beetle - just fitted new MAF - made no difference, but your explanation of the temp sensor makes loads of sense ( Really bad cold start, huge dead spot once running) . It's a green one, but cheap enough to replace. And easier than the next step which has to be the fuel filter & pump.
Here's something I can only refer to as a cascade failure. Purchased a new beetle cheap. Changed the heater control because the heater wasn't blowing, timing belt, water pump, and tensioner because I wasn't sure when it had been done last or ever done, since the odometer reads 130,000. Before I changed these, I noticed no heat from heater. Replaced the thermostat. It was stuck open. After that I found radiator fans weren't working. After testing found the thermo switch wasn't working. After all of that, suddenly got a code for the ect. Replaced that, now I have heat. I only paid 800 for the beetle, and I plan on driving the heck out of this car. I call it my beater bug. It runs really great! It's so fun to drive, and it's bigger on the inside! I guess that's why it was only 800 bucks! I've done much more to this car, but the cooling system had been badly neglected. Not really that expensive to fix. Oh. And one more thing. I tried to replace the reservoir on it but the after market bottle that I got from autozone had a problem. The pins in the sensor were too short and the connector wouldn't make contact so it kept giving a red flashing light on the dash. I ended up putting the old one back on and took that after market piece of junk back to autozone. That's my story. 5 speed standard. I love this bug!
Can I join your nightmare , It was recommended for me to change thermostat and W/p + belt , until local mechanic put things right for me.
I spent £180 for previous work , the offending part was £5.95😂
Volkswagens, everyone calls them trash yet you replace 4 parts, all very diy, and they run for another 20 years 🤷♀️🤣🤣 my golf is 20, I bought her super cheap, she wasn't loved at all, so now I'm replacing her sad parts and turning her into the car she can be. Though the entire thing, she's run. I'll never own another car. Vdub for life.
What year is your beetle?
@@powdere4donuts
It was a 2000. I sold it to downsize.
I basically have the Jetta that is your beetle. 5 speed w/ the 2.0 CBPA. Dude, you take care of it, fantastic and reliable setup that's relatively cheap to maintain. Only thing I insist on, have the dealer do your oil changes and flush the coolant every 2 or 3 years. Also heads up, don't be surprised if you find oil in your coolant soon. The oil coolers fail pretty often, on my third in 200k miles. Keeping really good coolant and checking your fluids at least once a week will save you from bigger problems down the line with this issue as you can get coolant in your engine when this cooler fails, vent your reservoir after running the engine anytime you turn your car off to keep it from pushing into the oil. Otherwise under pressure it'll push the other way since oil is under a much higher PSI. I had thus issue for months and surprising I never had an issue. The dealer is happy to preemptively tell you about certain maintenance though so it's worth the expensive oil change. Always Castrol 5~40 Edge Syn too!
Dude! I don't know what to do without you? You have been my go-to guy since buying my 99 Jetta MK4. You are very informative and I especially appreciate your dissecting parts for better understanding. Wish you lived closer LOL You'd be my new bestie ❤😉 Please don't go anywhere!
My 2004 VW Golf started taking multiple tries to get it to start when the engine was cold from sitting a few hours. I replaced the Coolant Temperature sensor and it cured the problem immediately.
Did you have a code?
Good talk. I'm always looking for information on how long parts usually last, under what conditions parts fail or wear out sooner, how to check a part for failure, etc. Thanks for the failure info on temperature sensors.
Always helpful . Years after this post . I’m a B5 guy and still have the 99 passat i took the kids to kindergarten in . Son has just helped me swap it to manual . . Never replaced the temp sensor and it’s black . Go figure . You covered all the likeliest potential issues Humble guy . Thks again
Hi mate I have a b5 Audi A4 (same chassis) with a 2.8 V6 I have a hot engine stall and not start issue I will be changing the temp sensor soon hoping it will fix. Did you have the same problem?
Thanks for this video HM! I had the starting problem with my 2000 Eurovan VR6. Replacing the GREEN Coolant Temp Sensor fixed my starting problem. I didn't know there's 4 Coolant Temp Sensors in my engine. Crazy!
The Eurovan is a whole different beast!
@@HumbleMechanic Your video helped convinced me it was the green CTS. Had to share your video to my mechanic to also convince him. Haha. Now he's a HM fan too!
When you buy a VW they should include an extra coolant sensor in the glove box because you're going to replace it eventually.
Garth Goldberg LOL I have replaced enough of them to kind of agree. But I think price wise, they are about $40
When you buy a VW they should give you a box with extra parts for the whole damn car as there are no parts that will not need replacing soon, it seems as if they go out of their way to make things as unreliable as possible.
Philip Koen. I have a Volkswagen Jetta 2011 with 110,000 miles and never have this sensor bad , is a very reliable car so far
Garth Goldberg j
The only difference between a Volkswagen and a bucket of shit is the bucket..
hello Charles, where can i get the chart for the target values of the coolant temperatures or even the ECT sensor terminal resistance.
Thanks
Charles I always had a question in my mind, my temp gauge never lines up straight up in the cluster, it sits a little to the right of the line in the cluster but stays steady there, given the fact that everything is electronically controlled is this normal? Thanks a lot for your help
I bought an 2003 vw gti with a check engine light, it was hard starting, and stopped starting, i got a cel for a short in the ect, it was a light green sensor that failed , they're cheap and easy to replace though
I've got a weird one on cold starts as soon as key is on temp gauge shoots up to 190. I've got a cts on the way. Also I noticed a little coolant in the center of electrical connection I'm assuming the sensor is the issue just never seen one cause the gauge to do this. What's your thoughts?
My secondary airpump starts and stops several times in cold start. I know i have a bad temp sensor. Could it be this causing the pump to force start and stop? I have no air leaks to the hoses of the pump. My combi valve works fine too.
Hello Charles my gauge shows 190F but my OBD live data shows 230F. Can you suggest what might be the problem?
hi Charles, thanks for that support. But kindly help me on this as well, have a Passat 2006 with a BZB engine but having a Random misfire in all the cylinders yet the coils, spark plugs and injectors are all new. It goes on and gives off dirty exhaust. Would you think that the problem could be with the coolant sensor or something else because we measured the compression for all the cylinders and they were fine.
Hey Charles, very detailed video btw..Can you come up with answer about my 01 ALH engine ECT (as my mechanic calls it), strange behaviour? Just installed a new tested ECT, however I'm faced with same phenomenon as with the previous existing ECT: While I turn the ignition on (at - 15 C weather condition), there's no power going to the Glow Plugs! When I disconnect the ECT plug, np, power goes to the glow plugs as it should, then cuts off after three min while engine running (on any case, no power whatsoever comes to the three Coolant Heater Glow Plugs)! I did also got the same phenomenon after putting another ECU in the car! My mechanic now is talking about all kinds costly possibilities and I'm thinking to simply put a power cut off switch behind ECT plug, to use it just to start the car (which isn't what I like to do anyway). Thank you in advance..
Nice video. I am getting the p1296 code error for VW Golf A4. I checked the sensor and it is fine. Do you know about the voltage that must provide the circuit for this sensor? As far as I know It must provide 5v for both thermistors. Not sure if the circuit is the problem or the thermostat. Regards
I have a problem, my car can´t not start in coold weather, i change the coolant sensor thinking that was the reason, but the problem persist, the car start, at the third time i turn on the key, its a 2001 jetta.
I’ve got a golf MK4- once warm it looses power - do you think that this sensor would be a possibility? I’ll order one - but I think it could be Lamda sensor related -? - it doesn’t have any error codes :(
Could be either one. Any faults?
This is an ultra common failure
I have the check engine light on. I took it to Autozone to have it scanned and they pulled codes p2181 and p0421. I was told its the CTS. I changed the original one maybe 100,000 miles ago due to the needle fluctuating. This time the needle stays at 190 so I am wondering if it would fail so soon. The readout said plausible signal. Thanks.
Thank you this video helped a lot and was more than informative. We need more in depth people like yourself
+Adam Landry glad to be able to help! :)
+Adam Landry glad to be able to help! :)
Does the coolant temperature sensor give the reading for the coolant temperature gauge on the dashboard, in a golf mk 5?
MY VW Amarok has had a cooling system issue recently where it seemed the water temp was colder than it should be. While driving the car, the temp would be around 84 deg, but drop down to 50deg C. Then sometimes go up to 93-96, but quickly back down. I have had the thermostat changed, and while running the first time, the temp steadily went up to 94deg C and was up and down around that temp, but when idling my car for a while, the temp gauge drops down to 45deg C, and while idling, it stays around this low temp. Is that normal for the temp to be that low at idle?
Hi there! I recently changed thermostat for mileage maintenance, but last night temperature rises from 90 to 120 Celsius. Today happen the same. Has CTS any issue with this?
@HumbleMechanic I'm getting a CEL on my 2007 GTI. The car gets up to normal operating temps (190) so I don't believe this is the thermostat. Am I correct in thinking this? Could it be the CTS?
Hi I have a 2006 VW Passat 2.0t and when I'm in a place for awhile my temp gage moves as of it's going to run hot but goes back up when I start driving...are my fans not working or where should I start looking first
I have a 2001 2 L beetle that has non working instrument cluster. Speedometer tach and fuel do not work. Register at zero. The odometer does work. Are you suggesting that the temp control sensor could be the cause? Thanks. Rob
Hey charles, great video! I've been getting what I think is vapor lock, and a check engine light for the coolant temp sensor. hopefully that will correct it. thanks for the video !!
aaaaand, I dropped the clip into the engine compartment and I cant find it
Hi i have a 2006 jetta with the BRM engin and i had an OBD error P0183 Fuel temperature sensor A circuit High , it referes to a Fuel temperature sensor that looks exactly the same a s the coolant temp sensor you mentioned inteh video , i wanted to know if i replace the fuel temp sensor will eventually a little fuel leakwhile installing the new one ,so how do i remove the air buble in teh fuel circuit once the sensor replaced
thanks for all the great videos
Karim
My 02 Passat GLX wagon (V6) temp gauge stops at 190, and never moves. But my OBDII says it's a lot hotter, closer to 220. Are there bad gauges too, or just bad sensors?
Very informative, thanks man!
I'm looking for the 'rear heater core temperature sensor' on my 2012 VW Beetle Turbo, any idea where this is? My check engine light came on and this was one of the codes, thought I replace it. I have already replaced my spark plugs and coils..
I have 2011 Tiguan 2.0 just wondering if engine coolant temperature sensor can be affecting my cooling fans coming on and off
On the Mk VI, I can't find the location of the sensor under the intake. Can you post any photos or location reference / DIY link? Thanks.
the sensor i driectly under egr valve of vw golf 2007 1,6 fsi
Any thoughts on tail lights and front side lights not working. changed bulbs and fuses. it started with right side only
Hi HumbleMechanic I want to change my coolant temp sensor in a audi 2.5 tdi 2001 but the problem is that sensor is stuck I can not get it out :( do you have any tips on how I can get it out
I'm having an issue on my 2007 GLI with both cooling fans not turning on, Ive checked the fans and all fuses inside and under the hood including the relays, all are good. does the CTS control the cooling fans on/off? not sure what to check next.
I have a 99 jetta 4cyl 2.0 its automatic i replaced both VSS input and output shifting fine my water return busted i replsced the housing but not the sensor now my transmission is not wanting to change gears in drive but will manually shift fine can these sensor cause the trans to go into limp mode thanks in advance
hey charles...my dash tem gauge works on and off. no check engine light. temp is 190f on the button but i still want gauges working. i wiggle the wires a bit and that does work but not for long. ill wing it til i get a new sensor if that does the trick. those connections get kinda dirty there so i will touch that up...hows my troubleshooting?
Hi Charles. om my b5.5 passat I had a blue conector on the bottom of the radiator. I changed this for a green one as I had a hard start at warm temperature. didn't help. so changed the other green one below fuel pump. still no good. any ideas?? thanks jeffery
Hey humble man. On a 2015 gti, could a bad coolant temp sensor cause the car to stall at idle? It's increasing fuel pressure high AF before it stalls.
thats exactly whats going on with my 2001 audi allroad! thanks
Hey HM, hoping for some advise on next trouble shooting an issue on my 2003 Jetta 2.0L
Have an issue where the temperature gauge will creep up to the mark past 190 and then after a minute so when quickly drop back to 190. After driving longer it will creep the the second mark past 190 and again after a minute or so drop back to 190. During the window at the second mark there is also a notable performance drop in the A/C.
The coolant level in the overflow is fine. The radiator fans are at least spinning while idling, but is hard to tell while driving when I notice when the temperature rising.
I have replaced the Coolant Temperature Sensor to no avail. What are your thoughts for replacing/testing next? Thermostat? Rad Fans? Rad?
If I changed mine about 8 months ago, is it possible it went bad again? I’m having similar problems as you were saying. Intermittent coolant readings on the cluster. It’s doesn’t go to zero, but lowers and raises. When I’m driving, it seems to be at correct temp, when i stop and idle for a bit, it seems to lower. Heat is always warm. Could I have gotten a bad part?
I have a 2001 VW Passat V6. I broke off the green part plastic part of the sensor and the copper housing and most of the sensor is still in the hole. So I cant reconnect it. Would I be alright driving the car with the sensor unplugged for a while until I can get it into a shop?
thanks for the tip i have just ordered the sensor i have a bad coolant flange and working also on the lower arm suspention on a 2002 new beetle thanks to your video of lower arm with polyurethan i will réplicas both of them
Hey Humble Mechanic thanks for the tips but my vw Jetta tdi 2010 has and a flashing glow plug in the dash board and then I see the engine light come on
recently i replaced the exhaust pressure control in the dealership due to engine light and they noted that my car had a fault for temperature sensor bank 1.g648.
is this the engine coolant temp sensor? or could it be the glow plug it self.
Though I do not have a problem in starting the car at all
Mine had a low voltage to Sensor so I’m going to assume that it wants to be replaced?
Do you have tips on temperature fluctuations? :) Mine does fluctuate and I can't decide whether it is a waterpump or blown head gasket..
What car and engine? Mileage? Any air in the system? Do you have any coolant loss,...smell of coolant in the cabin or under the hood? Fogged filmy windshield? ((Is the heat from the cabin air vents affected too?))
Excellent video! $15 part when salesperson wanted me to replace the starter!!
Dealership wants over $700 to replace it and the plugs.
I have a ‘08 VW Jetta 2.5L auto that is leaking coolant. It started at the end of winter. I was waiting for it to warm up to fix but then it slowed down and wasn’t leaking as much. (I’d Top off the globe once a week) but now it’s cold again and it’s getting worse. (Topping off every 1-2 days). It never overheats. It’s just losing coolant. Any ideas or common coolant problems on this engine?? Temp sensor gauge O-ring?
Hey mate , i have vw mk4 2002 SE, the car works fine but i have problem which is the thermostat is not opening , i changed it but still , nothing wrong while driving and no over heat , what could be the problem ?? Thanks
My 05 VW jetta tdi stalled in the middle of shifting. And wouldn't start back up. My mechanic said it started first thing in the morning. Do you think it is the sensor?
Super useful! Thank you! :)
Hey man! I just found your videos and they rock. I have a MK4 question if you don’t mind giving me a hand. As soon as I turn my ignition key on my fans start. Doesn’t matter where the knob is(I.e. feet, face, defrost, ect). I’ve unplugged multiple points such as the coolant temp sensor(working btw) the high pressure ac sensor, ac compressor, and they will only shut off when I unplug the FCM. So I ordered one of those but just wanted to run past you!
I have a 2014 Audi A6 TDi, sometimes when i drive the led screen tells me to stop, turn off the engine and check my coolant. Then a red coolant light appears, the coolant temperature doesn't change. (190) the fluid level is between the min and max. Then randomly the light will turn off, its very intermittent. Do you think my ECTS is going bad?
A no start you say? I've been trying to figure this out for a year; battery, starter and everything else I could swap quickly and test. 1.8t mk4 gti '04 usually takes between one or two cranks or a straight clunk then a crank then a start. Always starts no codes and temp sensor never drops out. Does it on cold and warm starts all alike. Opinion?
I've been trying to figure what is wrong with my 2004 passat. I replaced this sensor for the 3rd time now. Engine light is showing with "check emissions" message. I scanned it with vcds and 17664/p1256 code came along. It says it can be the wiring or the sensor. Since i replaced the sensor 3 times already, do you have any idea how to check the wiring? Also, there are time when the error disappears without taking any action. I have no idea where to start from with the wiring. Thx!
Great video!! Very informative! Thanks a ton.
that was quite brilliant. well presented. clear.
Now, my question. I have a 1995 VW T4 Transporter (Diesel) and the temp gauge is not working. the needle never rises above the C (even though the fans are kicking in when the engine is warm - which is apparently 90C / 194F). So, I replaced (what I think is) the coolant temp sensor. but I got no improvement. on the initial test the needle still only rises to the C (though my wife was driving it and said at 65mph she had the needle up at the first tick mark above, 1/4).
what else can I test here? am I looking at wiring or the gauge itself?
Sounds like the T-stat is stuck open.
Hey Charles,
Thanks for such a great informative video, I have a question if you have a couple of minutes to answer it pplease as that was not answered in the video, I've got a 2.5tdi 2009 T5 transporter, it has 2 coolant sensors, one 2pin on the rad and a 4 pin on the block. the fault i have is both rad fans come on full spin as soon as i put the ignition on and switch off only when i switch the ignition off. Which sensor could it be at fault? thanks karl
+karlsillett oh man good question. Not totally sure which on triggers the fans. I'd guess the 4 pin one. But that's just a guess
good video i replaced the sensor and wiring and it works but i still code?
I like how he loved this but didnt fucking answer?
My beetle radiator fan began to fail, every time i insert the key they start to run at high speed, could this be due to that sensor?
I’ve just had this issue. Changed the sensor in five minutes but I still have an intermittently working temperature gauge and I’m totally stuck now
Thank you so much replacing it today so glad my son recommended you 👍
Hi Humble Mechanic, I have an Audi A4 2.0T tfsi B7, when driving the temperature gauge never gets to 90, it only goes up to 90 when I have reached the destination and the engine is idle for a few minutes. Do you think I have a faulty sensor or is this something else? Thanks
Charles, you are true PROFESSIONAL!!!! Thanks for sharing your knowledge!
Quick question, on my 2012 VW CC, it runs rough at cold idle with random misfires. At 39 degrees Fahrenheit it reads 3,930 ohms. Once it warms up all smooths out. Temp gauge operates normal. I'm thinking temp sensor?? What do you think?
Thanks a lot, professional and informative.
hi
I have a a6 3.2 fsi with a stalling issue , it only does this when at normal runnig temp. it does not do it when cold . normally around 90 deg . it stalls in park or when driving . ive scaned for codes , none found. its like it runs out of fuel. ive replaced fuel pump in the tank , and on the engine. ive replaced the throttle positioning butterfly, ive replaced fuel pump relay and fuel pump controll unit . when its plugged in and running u can see the fuel pressure just fall , and the engine stalls, ive also replace the valve on the bottom of the mechanical pump and ive checked resistance of wires to ecu .. can u shed any more light on this
Here’s a question! I started my car this morning after sitting for days and it had a hard time trying to start but when it did the temp was already at 190 and went to 220 and stayed there as driving
Failed on my B6 at the time. Had the meter fall down and pop-up again. Was gone after replacing.
Now looking at replacing the one on my A5 B8 as it's not running all that well when cold and running under 2K rpm.
I've had a no start issue with my 2002 vw jetta tdi (manual transmission) for the last couple of years. After sitting with a charger on the disconnected battery for variable periods of time the car would start and run fine. It was a crap shoot whether or not it would start a second time. The instrument cluster warning lights would flicker and sometimes there would be clicking of the relays under the dash. Recently, the temperature warning light started intermittently flashing on and off and the same symptoms as described would occur and the car would not start again. Today, I replaced the temperature sensor and after replacing the coolant that I lost in the process I started the car and let it run for a couple of minutes. It started and ran fine as usual. I was able to stop and start the car multiple times without the warning light symptoms, clicking of relays, etc. I'll see if the the coolant temperature sensor was the problem in the next couple of weeks. The sensor is the green, four wire type. Thanks for the intelligent videos!
My parent's 1.4 Polo SE from 2010 has had this issue for a few years now, so this seems to be the part at fault, and unfortunately we are suffering the issue where the vehicle just will not start at all when it gets very hot, as the car isn't used to high ambient temperature here in the UK, when it reaches above 30c outside the engine will be tempromental causing it to fail to start, so I will look more into this but I believe that is what it is.
not sure if my is inaccurate, but I put water and when the water start boiling and it's stays at 90c then suddenly jump when I see steam come out of my car after a while. then yet again it could be elevation. 1,500 feet. then yet I haven't replaced it in a Long time
My mark 4 (1999) Golf indicates a coolant temp at around 60 degrees while cruising in cold weather (about 10 degrees ambient or lower). Noticed this after I replaced the radiator after a minor crash. The new radiator has a higher fin density. Could it be that the new radiator is too efficient?
Joachim Hillestad only if your thermostat is stuck open or partially open.
2001 beetle 1.9 coolant migrated in the wires causing a no start. Waiting on the new harness now. Hope it works!
Dude, Thanks alot. Ive been having an issue with both of my fans staying on for over 10 min after the car has been off. i recently got a CEL took it to Autozone and the told me with was ECT. After watching your video ill be changing it for sure. thanks!
2001 Audi TT 1.8t AWP. I recently changed my coolant temp sensor with a aftermarket BWD and now my fans don't work unless I turn the AC on. Note I got some coolant on the fan connector. Do you think the fans may not be turning on because I didn't buy OEM or because there is an interference with the connectors?
I would start with getting a proper sensor in it. That is the cheapest things to do.
im having trouble figuring out where this sensor is in my 2011 tiguan... anyone have any idea?
Hi HumbleMechanic,
I have a 2006 Polo 1.9tdi 96kw (Everything stock)
I've been having starting issues, It will crank - but no start. Sometimes I've unplugged the oil pressure sensor, then it starts, but recently that also doesn't work anymore. So I'm wondering; faulty engine coolant sensor? Faulty oil pressure sensor? Glow plugs? Injectors? Once it starts, it runs just fine. Sometimes I just start it with a (push start). But today even that is failing?
2ndly,
My aircons recirculate button keeps switching off but stays on when I have the car in reverse?
Any advice would be greatly appreciated.
Thank you
Regards
Janus
hi there Humble mechanic, I need your help as ive searched google up and down and cant find solution to my problem, I have a 2010 VW CC and recently replaced the cooler, in doing so the wires pulled out of the plug to the ECT its a two pin plug with a brown and yellow wire and the plug has 1 and 2 and I dont know which goes where,
when I start the car now the fan comes on imediately and stays on until I switch it of, can you please asist me in this matter?
Last week my Golf V GTI ECT gauge was showing appx. 170F after 10 minutes drive, I thought that’s weird so I shut the key off while I was driving and turn back to on as soon as I shut it off, after that the temperature showed zero, I repeated the process one more time and gauge is in the middle where it should be. And I did it a couple times more and it would just randomly fell in those three readings constantly. Zero, 170 and normal. And it kept doing that almost every day last week. But this whole week the gauge was reading normal, not even a single time did it read weird. I replaced the thermostat about two months ago before that happened, and I replaced the instrument cluster about three weeks ago. What could be the problem?
Got a 2012 polo vivo 1.6, temperature gauge indicates its getting hot once my speed moves to 120-140 km/h, when i reduce speed or drive about 60-80 km/h, does this indicate my sensor is faulty. because the temp gauge changes immediate after the speed change. please advise.
Hey Charles, I know this is an old vid--still, thanks for this one. Had a question--I have this 16v running on Digifant 2 and its idle is bouncing only on cold start. It is stable when warmed up. Am I correct in suspecting that the blue coolant temp sensor is at fault? If so, do I wait for the car to be in operating temp before I unplug the blue CTS and rev to 3k 3 times to reset the ECU/CTS?
It's worth a shot. That doesn't require spending any money. I like that.
thanks charles. tried it and no luck, still acts the same way. i'll just run without the ISV for now.
Hi HumbleMechanic! I just replace water pump at vw cc 2012 2.0t, when I start my car it take 8 minutes reach 190° F, and then stop there, when the gauge start to raising, does it with faster and shorts movements, but I feel like the engine is getting hot, but not alert light at dash board, some coments?
2007 Jetta code p2181 and its not overheating, however I noticed that only one fan works with the AC turned on. Replace the ect first, then the fan? Be the smaller fan.
Hi, I know this is an old video but I need some please. So I replaced the radiator and fans on my 09 Rabbit. My fans do not work and overheats at idle when sitting in traffic for about 10-15mins. I checked relays and fuses. They look fine. Is there something I am missing? Could it possibly be the part you are talking about in this video?
Hi there. 1999 6n polo. Clutch on aircon drops out as soon as engine temp gets near 70 celcius, also 3 seconds after starting engine wants to cut out as though theres no choke working. Could this be temp sensor related? Also, ive removed thermostat so my aircon works as the engine temp never gets near 70 C on freeway but does running local. Theres two switches in the thermostat housing, which on is the ETCS? Thanks.
Has anybody read this!!!!!!!!!!
I have a 05 jetta it over heat when I keep my foot on the brakes for to long what do you think that could be
Water pump
After hours of threads, a possible answer to my problem. My 2000 Audi a4 quarto 1.8 still has the black ects .The car heats up to a point were the temperature cluster beeps with the red light thermo on dash after about ten minutes of driving .Upper radiator hose not real hot,canister hose circulating , heat blowing hot threw out. Water pump change in 07 . My hope is that I put in a greeny and problem solved. Oh yea fans working ,turbo pipe glows red ,but car seems fine. If that thermostat was bad would I not get heat ? And the water pump if failing would it give me more signs other than that blinking beeping dash?
i've got a mk4 GTi 1.8t. Broke down today, cut out when I was slowing down after losing power, won't start, and when it does it idles for 30 seconds and cuts out again. Had the P1296 code (Coolant System Malfunction). Replaced the CTS a couple months ago but it was a cheap one for £5. Is it likely to be the CTS or thermostat?
HumbleMichanic , Can the coolant sensor make the fan not shut off ,? i have a 2015 Jetta , your answer would be appreciated.
Fun Size - Did you ever find a solution? My cooling fan is not coming on and a/c blowing hot air.
What temp should your coolant be in a 2006 jetta 2.5l
I have a golf iv and gauge stays normally 90°C but the fan operates around 93-95 is that ok? Ive noticed the gauge moving slightly above 90 every time the fan is going on
My fans on 01 beetle stay on constant. Replaced the relay 127.00 and still they stay on. Could it be this sensor ?
Can faulty coolant sensor cause rough idle at first cold startup? No check engine light. 02 Eurovan vr6 2.8. Thanks
Absolutely
Thanks so much but i think i have a different problem when i buy new temperature sensor for my vw polo bky engine it's struggling to start in the morning. When i put the old sensor its start normaly
But the problem with the old sensor the gauge is always low
I recently replaced mine on my 1.8t Polo GTi and I immediately noticed good fuel consumption so if you have this fault I recommend replacing it asap.
hey Humble mechanic I have a 2013 Jetta 2.0L. I have a ECT code P0118 (G62) sensor. On top of that its keeping both my AC and rad fan on at all times full speed.
I have a 2004 VW Beetle with a 2.0 l engine. The engine is hard to start and when it starts it idles rough at first then it revs up to a really high RPM on it's own. The radiator fans don't work and the AC compressor doesn't work. This all started suddenly. It seemed to be working OK the last time I drove it. Could all these symptoms be caused by a bad coolant temperature sensor?
Sounds like it might be the wiring.