Phaeton :: Coolant Overheating Warning Coming On - Fans Going Crazy
Feb 11, 2014
I have a V8 engine, and I have been getting the coolant overheating warning come on once in a while.
The engine fans go crazy, and the temperature needle on the small round gauge climbs all the way to red then the coolant overheating warning comes on in dash screen.
This can happen right after I turn the car on, or on occasion, it can happen as I am driving around the city.
I stop, switch the car off, and I turn it back on after a minute, and the car is just fine. So, basically, it doesn't seem like the engine coolant is actually overheating, but the fans and warning systems seem to think that they are. The fans are pretty loud, and its noticeable when they go on, and when this happens, I know that the needle will go all the way up and the warning will go off. I also know that if I turn the car off for a minute, and it will be just fine.
The conditions are random for when this happens. So its not when its particularly hot or cold or anything predictable. Could this just be a sticky thermostat? Is it a bad water pump? Bad battery?
The trouble is that now I am afraid I cant take a real drive. Around the city I can just pull over, but I am afraid to take the car two hours out or something.
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On a few occasion, usually during cool weather, the engine temperature rises up to 130 C, the coolant overheating warning comes on for a few about a minute or two and then the temperature goes back to normal (90 C.)
The car has 106,000 km. I purchased it last summer from an independent use car dealer. I inquired about the car calling the previous owner. He did mentioned that the only problem he ever experience was that the car overheated on a few occasion during the winter months (cooler weather).
Could it be that the thermostat needs to be replaced?
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As the title says, car is overheating. Car gets to 190F within a couple miles drive. Temperature fluctuates between 190F and 225F.
Water pump was replaced ~2 months ago. Was not overheating prior. Temp reached 190F and stayed. Currently has the "black top" coolant temp sensor.
I noticed the coolant fans are not running after I turn the ignition off. This time of year they would usually be running after turning the engine off. If car is overheated and with AC off the fans do not run while engine is running.
I used the guide below to try diagnosing the cause: [URL] ....
Remember both fans should come on in slow speed any time the key is on and the AC is on - if the temperature is above about 32 F (0 C). Both fans run with key on and AC on
S180 (fuse 8, 30 amps, green plastic, above battery) must be good for slow speed operation.
Fuse and holder look good: no melting, no discoloration.
S164 (fuse 3, 40 amps, metal strip, above battery) must be good for fast speed operation.
fuse looks good: unbroken.
To ensure the AC circuits and the Fan Control Module has power check:
Fuse 5 on the cabin fuse panel.
Fuse 16 on the cabin fuse panel. When this fuse is blown the radiator fans will often run unexpectedly.
Fuse 25 on the cabin fuse panel.
All three fuses look good: unbroken
For the first test of the slow speed fans from the radiator thermoswitch have the key off.....Both fans should run in slow speed.
Passed test: both fans run slow
The second test is for the fast speed fans, key on, AC off.... Both fans should run in fast speed.
Passed test: both fans run fast
If the fans run in the tests above, then you should be good to go. No further tests are needed.
If you have been seeing high coolant temperatures and the fans have not been running, then you may need a new thermoswitch.
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2005 Dodge Neon SXT 206XXX
Long story short on a trip (about a 1 hr. drive) got about a block away from destination and gauge showed it was over heating. Stopped the car started up after five min. just fine. Got home replaced the thermostat and cap (old cap was junk). New cap was junk aftermarket so yesterday I took the same car on a half hour drive to get a Mopar cap ran just fine up again until a block away, pulled off the road turned it off let it set a few min. then didn't even show it was over heating. Let the pressure off and replaced the cap and added in a bit more coolant ran fine all the way back (even pushed speed in a few spots).
The above is just what seems to be the mechanical side of the issue. After noticing the gauge was going a bit above the normal spot I noticed my cooling fans are not coming on. Checked fuse and tested relays out to be fine. First thought is to check voltage to the fans but also tempted to check coolant temp sensor with bench test. Will be going over to my dads to do voltage testing later today.
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Lately, I've noticed that when I start the car in the morning, the radiator fans come on at full blast, even though it's around 20 degrees F (not all the time, but most days). My temperature gauges all show (what I assume are) correct temps as it starts out cold, water first goes to 200 and stops, then oil slowly climbs and stops at 200 I believe.
They don't climb any faster or slower that I've seen, and usually by the time I get to work (around 20 minutes), the oil temp has probably climbed about 3/4 of the way to normal while the water is steady at 200.
Is this normal? I don't recall this happening, as I would've noticed as the fans are quite loud at full blast. I haven't had a chance to run a diagnostic scan yet, but the car hasn't warned me of anything either.
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Today I received a message on the MFI telling me that the coolant was overheating. My better judgement told me to immediately pull over at the next available spot to turn off the car since the coolant temp gauge was almost at 280. This is well over the 200 where it usually resides. However, the oil temp gauge was right at 200 which is normal.
Perplexed, I called my dealer. The Phaeton Tech was gone for the day so they suggested that I have the car towed in for inspection. Knowing the temperament of the Phaeton (2004 V8), I chose to restart after about 5 minutes. At that point, everything was reading fine & I drove home (about 20 minutes). I ran a VAG-COM scan to see if anything would come up, but nothing did.
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My Phaeton (V8) is overheating when the outside temperature is around 0 C (+/-10 C).
It rises all the way to 130 C, the warning signs comes up, it stays there for about a minute and than the fans kick on and the T goes back to normal.
It has been doing that for the last three years intermittently in the spring and fall.
This season it is getting more persistent and it is occurring pretty much every time I use the car (usually not more that once per cycle, a cycle being from the time the engine is started to shut down).
The dealership can't seem to find the problem. The thermostat was replaced at the same time that the water pump and timing belt were replaced and it did not solved the problem.
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I was cleaning my passat the other day and I took my air filter out, however I didn't disconnect the wires and hoses on top of the box, I just raised the top cover up and pulled the filter out and cleaned it and checked it and put it back in, I also took out the cabin filter out and cleaned it and put it back in too, then I started the car and took it for a ride and the car started over heating, it keeps giving me STOP CHECK COOLANT warning and the temperature rises all the way to max RED.
I check the coolant level is at level and the radiator fans are spinning, however I noticed the lower hose that goes from reservoir to the radiator is cooler than the other hoses, what could be the problem? The water in the reservoir is hot too, could this be from a faulty thermostat? a sensor? or somewhere I read there is a fuse somewhere in the engine bay? I'm not too familiar with these 1.8t engines, the temp sensor was acting funny before too like sometimes it would go all the way to zero and stay there and go up and go down to zero and then raise, which I think there might be a bad connection or bad sensor.
I forgot to add the car is a 2003 1.8T.
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Before I go buy a Bentley manual to dig around, when should my radiator fans kick on. I had the car idling for 10 minutes, no ac or heat on, and my coolant warning light came on, it overheated. It already has a new fan switch in the radiator, and the fuses are good.
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Coolant overheat warning. Luckily, was moments from home so pulled in and stopped for about 6 hours. Checked coolant on level surface...looks ok. Started it up and drove around neighborhood. Car steadily climbs to 200 degrees F and then will sit there for around 5 minutes. As oil temperature breaks the halfway point, the coolant temp begins to steadily rise again until it hits just below to overheat mark for a couple minutes, then finally pushes through into the red.
Parked car overnight.
Drove to VW repair shop. Exact same results driving there. Temp increases from ignition to 200 degrees over a couple minutes then stops for 5+ minutes. Oil gets hot, coolant gets hot, I get very hot.Only 10 Months ago, I replaced the timing belt, water pump, and thermostat with genuine parts. I know what a pain in the arse it is to change these items so I did them all at once. I am sick thinking about having to do it yet again with these apes poking around my car.
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Experiencing cooling problems with a truck this new? My 2 month old supercrew 5.0 began over heating on a road trip last week. After about 400 miles of driving I see coolant temp start climbing until the overheating warning popped up. Pulled over, turned engine off, popped the hood and did not notice any obvious signs of overheating. Ended up waiting about 15 minutes, started truck up again, temp gauge reading 1/2.
Get back on the road, within 5 min temp starts climbing again, reaches ~ 3/4 then all of a sudden returns to 1/2. Continue on 10 min later temp gauge climbs from 1/2 to overheating quickly. I pulled over again same situation no obvious signs of overheating, but allow sometime to cool off. Started truck again temp gauge reads 1/2. Continue driving and temp gauge seems possessed, going from 1/2 to 3/4 back to 1/2 to almost overheating as I nursed it to the next dealer that I could find.
Dealer tech was able to mimic the problem and believes that coolant is not flowing properly. Thermostat replaced, water pump pulled and inspected, air bleed out of the system, all with no improvement. Now heads are being pulled/replaced to see if this solves the problem. Its depressing to have my new truck with 2,382 miles sitting under the knife at the dealer.
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On starting today I had an alarm to check coolant. Never had this before - and the expansion tank was dry. No visible signs of loss - Oil seems fine and free from contaminant.. so I guess not the head gasket!
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While driving my 04 w12 a few months ago i noticed a "stutter" or brief jerk while driving. the next morning i had a "coolant level" warning. i took the car to a mechanic i use who diagnosed the problem as a broken coolant line involving the transmission cooler, with the result that coolant migrated to the atf. indication was that the tranny was toast, along with the atf cooler. I authorized a repair (not inexpensive), keeping costs down by installing a used tranny. since the car was "fixed" i still got a "jerk" usually in fourth gear, sometimes in third. i took the car back and was told that the tranny was flushed numerous times and the transmission was reflashed. i picked the car up yesterday, but i still get the "jerks", now usually in third gear.
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I have a 2002 passat. it is a v6 with a manual trans (i do not know about gls or anything like that) but the coolant stop light is coming on and if i drive, it runs hotter than normal. i assume it is a thermostat stuck closed but is there anything else i should look at before i make that assumption?
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I own a 2001 isuzi trooper, the water pipe has been broken a couple times, so the radiator has been leaking so my car overheats. But I fixed it a couple of months ago, yet after I fixed it the car kept going through the water/coolant extremely fast and was overheating unless i put water in it every other day.
Yet, a couple of days ago, I was driving home, and i heard a bubbling noise, ignoring it i kept driving only to have complete loss of my accelerator and had my car rolling along the highway unable to accelerate. (And the last time I put water in the radiator was 10 days ago) now my car won't even turn on, and it sounds like it is having a very difficult time when I try the ignition. plus when I do try to turn the engine on, coolant is coming out of my exhaust pipe.
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Last week I drove my 2007 Honda Odyssey with about 100k on a 4 hour trek in the cold, and all of the sudden the heat stopped working. The fans were blowing, but warm air was not coming out. It was Christmas eve and nothing I could really do about it, so let it be. Drove another 10 minutes that night with no heat to my destination, and many hours later still Christmas eve I drove another 15 minutes. Heat didn't work, but car operated just fine.
Christmas day, drove the car for about 20 minutes with no heat, and all of the sudden the temperature gauge skyrockets, and the engine light goes on, the car is clearly overheating (could smell smoke from the engine). Let the car cool for the rest of the day, check it and there is no coolant at all. Had a local mechanic check some other things like the thermostat but found nothing, so refilled the coolant, and drove 4 hours again with no problems--heat works and everything. I was expecting to have to stop all the time to refill the coolant, but didn't have to because it never leaked on the entire trip. I took the car to the Honda dealer and they check it and find no leaks and nothing else wrong with the car, and offer no explanation on how the coolant magically disappeared, only confirming that they cleaned coolant which had leaked/spilled all over. The only possible explanation was that I had some work done on the car a few months ago (new belts) and the mechanic I used didn't flush the coolant properly.
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I have an 04 gti 1.8t and last night it started over heating. I pulled over and checked the coolant and the oil but everything looked good. I let it cool down and drove it home. When I popped the hood there was a little steam coming from the coolant overflow tank but I saw no leaking. I decided to vent the pressure off the system and then I got a little drip on the passenger side close to where the inter cooler is. I can't pinpoint the leak though.
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Yesterday my light went on for the exhaust warning. Does this mean I should now drive with a window open? And how serious can it be? Also, about 2 months ago I was told I need a serpentine belt. Would this have anything to do with the light coming on? You see, last time I wrote in here, I was told I needed new front brake pads and rotors. I was told from folks here that the dealer's quote was 2X what it should be, so I am hesitating to go back to same dealer.
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I've figured out why my car has been overheating lately, the fans aren't running at all! How do I get the front end off and check things out, is there a fuse diagram for the B6...
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I have a coolant leak coming from the area under the oil filter housing where the cooler is. My thought is the little plastic pipe between the cooler and the engine block. I have the alternator removed but am wondering what's next. Can I get to the cooler without dropping the engine?
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few weeks ago i had a coolant light go off and said stop stop flashed and then check manual lights. Keep in mind i do live in socal, were weather is not bad and the time i started this was not colder then normal times, i then parked went on with my day came back and it was fine no warning. This morning i had another light and warning come up (warmer then before) i dont know if it really is low or problem with the ecu? i checked the coolant an it is fine?
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