Golf IV / Jetta IV :: GTI VR6 Fans On Radiator Don't Turn On / Engine Gets Warm
I'm having an issue with my fans on my radiator. They don't turn on when the engine gets warm and the A/C is off. I've replaced the crack pipe, water pump, and belt tensioner. I've replaced the fans not to long ago because the low speed wasn't working. I tested low speed at the fan connector and it wasn't working. After replacing fans I tested and it was working when jumping the pins on the thermo switch connector. I got both low and high speeds to work during that test. I've since replaced the thermo switch to see if it would fix the issue but the fans still won't come on without turning the A/C on. Any other tests I could do or should I just try to get another thermo switch.
View 4 RepliesGolf IV / Jetta IV :: AC Will Not Activate Until Engine Gets Hot Enough That Radiator Fans Turn On
I have an odd problem. My AC will not activate until the engine gets hot enough that the radiator fans turn on. Once they do, the engine RPMs drop, the clutch kicks in, and I get frosty cold air with no problems. I already replaced my FCM and checked all fuses. It worked consistently all last summer and considering the AC is nice and cold once it kicks in, I don't think this is a pressure issue and it was recharged at the beginning of last summer by a good shop.
I changed my coolant flange a few months ago, same temp sensor. Didn't try AC back then as it was cool outside still. Could this have something to do with it? I have proper readout on my dash. Maybe it's the ambient temp sensor?
2.0 Getta GL AEG 230,000 miles.
Pontiac - Grandam :: 2000 - Radiator Fans Won't Turn On
I m having trouble figuring out why the radiator fans wont turn on, Even when the ac is turned on it still doesn't turn on, I changed the coolant temp senser. still nothing, i also ran a whire from the battery to the fan and they both turned on. I also stitched around relays and checked fused still nothing. 2000 pontiac grand am 2.4L engine 4dr auto trans.
View 14 RepliesGolf/GTI VI :: CEL Is On And Code Is P2181
My CEL is on and the code is a p2181 (cooling system performance). My car isn't overheating or taking too long too warm up, so I'm guessing its not a bad thermostat or water pump. I want to replace the ECT sensor, but I haven't found any instructions for doing this on the 2.0TSI engine. Aren't there 2 ECT sensors? One on the lower radiator hose and one on the thermostat/water pump housing.
Lower radiator hose ECT sensor: [URL] .....
Thermostat/water pump housing ECT sensor: [URL] ....
Which one do I need to replace? The radiator hose ECT sensor seems easy enough to access, but I'm not sure what needs to be removed to replace the sensor on the thermostat housing?
I noticed that the temperature isn't always sitting at 190. It will drop slightly below on occasion for short periods of time. Could this actually be a thermostat issue?
Golf IV R32 :: CEL Came On / P2181 Code
CEL came on yesterday and pulled P2181 which looks like it could be a bunch of different things. Taking it to the shop tomorrow morning so any guesses? BTW I would attempt the easy things first but it is my daily so.....
View 8 RepliesGolf IV R32 :: CEL Code Is P2181 For Coolant System
So after 1.5 years of owning my R I got my first CEL. The code is P2181. I did some searching and this is a problem in the coolant system.
In the previous posts about this these were the possible problems:
1) Coolant sensor
2) Thermostat
3) Bad fans
4) Coolant mixture
5) Water pump
I checked my car and I have the updated green coolant sensor. My question is should I just get a thermostat and replace that or should I replace the green coolant sensor with another one? Do the green ones go bad?
Golf IV / Jetta IV :: Radiator Fans Are Unreliable
As it was such a matter of time, my fans on my 24v gave up during winter, no big deal as it was a pretty cold winter but now that spring is around the corner, I gotta fix this issue. To they change for the same OEM unit that will die in the next 30k miles.
View 3 RepliesGolf IV R32 :: Odd Code Combo - P2181 And Cylinder 2 Misfire
Started happening recently where I can't bring her past 5k without misfiring on cyl 2 and throwing the p2181 code. I changed the coil just to be sure, but I do know my coolant sensor wires were a little snug from the TB being so close.
View 1 RepliesGolf IV / Jetta IV :: Smoke Coming From Radiator Fans
I don't understand what is going on I noticed smoke coming from my fans radiator fans and I'm pretty sure that it was motor being fried I've gone to the junkyard and bought a used assembly hooked it up and still nothing could be a possibility that when the motor fried it fried the control module for the fans
View 1 RepliesGolf IV / Jetta IV :: Radiator Fans Making Noise?
Radiator fans making tons of noise on my newly purchased gli jetta...
View 3 RepliesGolf IV / Jetta IV :: Only One Of Radiator Cooling Fans Working
I have a quick question, I got a 2005 mk4 gli, and when the cooling fans go on, only one works, the other one does not, I checked the fuse and its fine.
View 13 RepliesGolf IV / Jetta IV :: Code P2181 Come Up Twice - Small Coolant Leak And Some Oil Mix?
Had a P2181 come up twice now... both on startup on a cool morning. Came on again this weekend. Monday morning I noticed a small coolant leak under the front of the car directly in line with the passenger headlight, but it only leaks if I park the car with the front down a slope. I parked uphill on Monday night and no leak in the morning, but I backed in facing downhill on Tuesday and had a small leak when I checked late last night.
So, last night I broke out the UV/black light -- G12 seems to fluoresce yellow'ish. I couldn't see much, so it is a small leak. There is some wetness on the bottom passenger side of the rad that's dripping over the back side of the front bumper/lip. No wetness around any other hoses, thermostat housing, temp sensor, turbo lines. But that's all from the top view. No time yet this week to get it up on stands to pull the bumper/splash shields for a closer look either.
I am little concerned tho as there's some wetness around the valve cover and when I pulled the oil cap my eyes suggested a bit of fluorescence under the cap and inside the valve cover. I'm a little worried oil and coolant may be meeting up somewhere... And to think... I was just in the process of getting geared up to do brakes and plugs before getting a modest tune (stage 1).
Golf IV / Jetta IV :: CEL On For Code P2181 Coolant System Performance
Like the title states, I've got P2181 (coolant system performance) CEL on again. I've had this code before and finally had everything serviced. It was off for 5k miles! I've spent a lot of time diagnosing this on the previous occurrences, and was 99% certain it was the thermostat due to the coolant temp dropping a notch or so when engine braking* on the interstate for more than a few seconds.
The current issue is mainly that the car will not heat up quite as fast, but it will not go lower from engine braking for a good chunk of time. I'm getting fairly poor MPG compared to what I was getting a month or two ago. The major changes are winter fuel blends and winter tires, which I'm sure affect the MPG a little, but I would hope not as much as I am seeing. Old average was around 27mpg combined and 30 or so for mostly highway, now I'm getting 24 tops. This is likely due to engine temps not being up to allow for most efficient fuel burning.
First plan is to change the CTS and see if that will fix it. If the code comes back after that, I'll have to check the thermostat and coolant mixture, but I wouldn't expect it to last only 5k miles.
Current: 105k
Thermostat and coolant changed at 100k
Water pump at 80k
CTS sometime around 70k
Engine braking lowering temp due to no fuel being ignited and coolant still circulating through the system if thermostat open.
Golf IV R32 :: CEL Popped On / P2181 Code - Cooling System Performance
Last night on my way to go get hammered the check engine light popped on...
"Cooling System Performance"
I have read a few different post, and the last one I read referred to his radiator fans. I know for a fact one of them isn't working and I haven't replaced it yet because it hasn't advisable effected my driving.
So my question is what could be causing this? Also I'm not sure if this matters but my a/c doesn't work either.
Golf IV R32 :: CEL Code P2181 - Performance Malfunction In Cooling System
The code in question is:
18613 - Performance Malfunction in Cooling System
P2181 - 008 - Implausible Signal - MIL ON
Long story short, there are 5 main reasons this problem can pop up, listed in order of likelihood, least to greatest:
1) Coolant sensor
2) Thermostat
3) Bad fans
4) Coolant mixture
5) Water pump
It's a fun catch-all code that can be thrown from any of those. Given that our cars are approaching the 6 year mark, the coolant sensor & thermostat are the most likely culprits. Most of us up on maintenance have already done the green-top sensor, so it's probably the thermostat. In which case, here is the official changing the thermostat DIY: [URL] .....
If you get this code, first check your fans. They're running? Okay, change your sensor & clear it. If it comes back, change the thermostat. If it still comes back, which has been known to happen, investigate further. [IMG] [URL] .....
Golf IV / Jetta IV :: Radiator Fans And AC Stopped Working At The Same Time
A few days ago I was driving around. I get back in my car and when i turn it on no air blows and the radiator fans aren't working at all. My car hasn't overheated but have stopped driving until I can figure the issue out. I have since replaced the fuse box on top of the battery to no avail. I was thinking that it could possibly be the fan control module but in all the posts I am reading not one says that theirs don't work, they just keep running. So is there something else i should be looking at?
View 1 RepliesGolf IV / Jetta IV :: Both Radiator Fans Run All The Time While Engine On Even When Cold?
Both my radiator fans run all the time, even if the engine is cold. Soon as I fire it up, even if it's 0 degrees, they are running. To be clear, as expected, the fans do not run if the car is off.
Based on these symptoms, what components could be the culprit?
Golf IV R32 :: Overheating - Radiator Fans On - Cruise Control Stopped Working?
So I noticed my temp gauge was starting to rise when I was on the freeway. I figured my fans were out but I just opened my hood and both fans were spinning. When I turned the car off both fans turned off but the temp gauge was almost into the red.
In the morning I turned on my AC and only the passenger side fan was working.
So I am not really sure what my next diagnostic step should be. The engine was not radiating any heat so I am not sure that it is even actually running that hot. Could it possibly be the temperature gauge? If I got a vagcom would I be able to check the actual temperature from there?
I am also concerned on how to find out if the fans are running at both speeds at the appropriate times.
Not sure if this is related but my cruise control stopped working a few weeks ago also.
Golf V R32 :: Fans In Engine Bay Won't Turn Off
The fans in the engine bay wont turn off. As long as the car is on they run. they do turn off when the car is off.
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