Passat (B5) :: 2002 - AC Malfunction / Not Enough Cooling
Aug 5, 2008
Not enough cooling in the B5.5 Passat wagon.
I had the freon checked and it seems to be fine, however it takes a long time for the cabin to cool of here in North Carolina. THe air coming out of the vents doesn't seem as cold as my older 1998 Passat. I used to have a silver sedan 1.8T and the a/c was temperature was ice cold and it got very cold after 20 seconds or so. It reminded me of GM cars.
My wagon is dark blue and beige leather interior which is probably why it takes longer to cool off. If you go for a short trip and the car has been out in the sun it would take at least 15 to 20 minutes to get comfortable. The compressor generally cycles off only once and then it stays on for the duration. My old sedan was the same way. I use the a/c on the rec mode which keep the air colder but still not quite as cold as some other models.
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My MIL came on the other night so I brought it to the dealer today for diagnosis.
Per tech, "Found 1 DTC P2181 for cooling system malfunction, checked measuring values, found thermostat sticking open.
Recommendation is to replace thermostat with housing." I have 95K miles on the car, original owner...first time in a long time to have an issue.
The SA indicated the thermostat replacement. The tech indicated the thermostat is in the front of the engine which is hard to access.
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I've recently started popping up a random P2181 performance malfunction in cooling system.
It's so random and shows no signs of any other problems that I'm confused. Temp gets hot, stays exactly where it should be, 200. Never gets a tick hotter, or even close to above 200. Air works, heat works fine. No loss of power. It only seems to come on when I really put my foot down.
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The MIL came on and I scanned for codes. First was P0118, Engine Coolant Temp Circuit High Input. Reset it and then received P1296 -Cooling System Malfunction. Temp gauge needle is positioned where it always is.
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This code came up on my car, what it means or what part needs to be replaced.
008577 - Performance Malfunction in Cooling System
P2181 - 008 - Implausible Signal - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 2
Mileage: 84971 km
[Code] .....
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I am getting to check engine codes and I can't figure out what is causing them, one is P1296 cooling system malfunction, the other is P1654 Check DTC Memory of control panel ECU, any clues as to why I'm getting these, I did have a bad thermostat i changed that and it's still on, I also used the new prestone antifreeze for all makes and models, cause I am about 200 miles away from a dealership for g12.
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Is it possible to have work done on a 2002 Passat's A/C that isn't cooling very well. Can they add freon or whatever?
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I was driving my '02 Passat 1.8T home yesterday, and I noticed the steering wheel controls for the sound system weren't working. I thought nothing of it, believing that it was a fuse. I also noticed the my radar detector wasn't on, but was plugged in. So the cig lighter wasn't working either. Hmm. I got home, and pulled into my driveway, and then noticed that the HomeLink garage door opener wasn't functioning either. It was late so I just left the car outside for the night, planning to work on it the next day. Today, I went to go get my friend (I didn't have time to check on the problem), and when I honked for him to come outside, the HORN wouldn't work. At that point, I went home, popped open the fuse box, and checked all the corresponding fuses. And whaddaya know, all the fuses are fine. Yet, still, nothing work.
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I have a 2000 Nissan Frontier that is a 4X4 and has the V6 engine. Mileage is 172,000+. For a few years, I have had problems with the AC no longer cooling after I drive 20 or so miles and stop the truck, go in a store and start back up only to find that the AC will not cool after the stop. This seems to happen more when the weather is hot. Only once has it gone out without stopping the car and it was on I40 driving trough Oklahoma in 100+ degree weather. Once it quits cooling, after driving 20 to 30 minutes, it usually starts to cool again. It sometimes speeds up the process if I roll the windows down.Coolant levels are fine.
So...is there a faulty sensor somewhere? What could it be that is the problem?
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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] .....
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Bought a mk4 1.8 gti golf last week and day after I got it I filled it up with petrol at Tesco. Since I did that, the engine management light has been on. It hasn't affected the drive or anything so haven't done anything about it yet.
One of the guys at work plugged in his computer thing to it to find out the fault and the code was coming up as 'cooling system malfunction'. He took the fault off so the light no longer comes on but now it makes the most horrendous noise like a grinder or something when the engine is running. I have not driven it anywhere and won't until it has been looked at but just wondered what others thoughts on it might be? Could the noise be something to do with the turbo? Had new cam belt, water pump etc at about 138000/139000 miles (November 2013) and hasn't done more than 10000 since.
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So I picked up this 24v vr6 in florida and it has the folowing codes:
p2181 malfunction in cooling system
p0303 misfire in cylinder 3
p0305 misfire in cylinder 5
p0300 random multiple misfires detected
p1570 engine control module disabled
I am thinking the ecu is fried? otherwise why else would that last code pop up. misfire codes im assuming are related to the ecu because theres new COP on each cylinder, newer starter, newer alternator, new spark plugs. Cooling system malfunction im thinking could be the ECT sensor, apparently the water pump was replaced a little while back.
If the ecu is fried can I buy a new one chipped from like APR or do they need the existing ecu and then they modify it?
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2002 F250,heavy duty. Problem, AC cools while driving at night or even on a cloudy day but on a hot sunny day you have to run on max and even then will not cool cab. I had gas checked they said it was good to go. I bought this truck new and the ac has always been weak in my opinion. I took it to dealer the first summer I owned it everything checked out ok. What the problem might be?
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I recently picked up an 02 Golf with a 2.0/5-speed. It's just a plain-jane model without all the bells and whistles. My fans and A/C aren't working. I can deal with no A/C but the cooling fans are kinda important. I did all of the trouble shooting. Both fans work on low and high when jumped at the radiator temp switch so my fans aren't the problem. I replaced the temp switch with no change. My OBD-II scanner shows that my actual coolant temperature was about 10 degrees off from my temp gauge so I replaced the temp sensor too. The timing belt and water pump were both changed about 5K ago.
I borrowed a "good" FCM from a buddy's car and that didn't work either. I went through the troubleshooting diagnostics for the FCM harness and see that I do not have continuity between T14/14 & T14/5 on the harness side. This indicates that the "F38 Ambient Temp Swicth" is possibly my culprit. Everything else checks out good on the FCM harness. Where is this switch located? I've searched online and found nothing specific to my 02. For the sake of testing can I jump these 2 wires for continuity to simulate a working switch? From what I've read this ambient temp switch disables the fans and A/C when air temps are below a certain temp. My next step is going to be wiring in a variable speed fan controller if I can't figure this out .....but I'd rather not get in to that if I can get the factory setup working.
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I have a problem with my Toyota Camry 2002 4 cyl. 2.4L, I changed my Motor cooling fan but my car keeps overheating, I changed the overflow tank top, but still its overheating and the car turns off by itself sometimes, when its cold (after i turn it on) it starts bucking and also if its stop (example, if i park somewhere), and at last, the temp isn't showing correctly on my dashboard.
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I have a 2002 Chevy Malibu 3.1L Automatic that I've replaced the head gasket, intake manifold gasket, and exhaust manifold gaskets on three times in 6 years. The most recent time I think was caused by an overheating problem originally. A few weeks ago it overheated one time and boiled the coolant, but I did not let it redline on the temp-gauge. Still, the next day I found distinct evidence of coolant in the oil. After replacing the full gasket set and thermostat for good measure, I'm still getting an overheating problem. My assumption was that the coolant leaked into the oil and then when the car overheated I put only water in it temporarily which boiled somehow and probably caused more damage. This happened the first time I had a gasket problem years ago.
I'm not actually losing antifreeze that I can tell, so I know it's not the common intake manifold problem. I've checked all the hoses to make sure they're all properly secure as well and I can identify no dampness or evidence of pooling. I generally run the heat to identify if my cooling system is working correctly or is at least somewhat functioning. It never does upon start-up, but I've found that if I rev the engine to above 4,000rpms for a sustained period of time (5-10 seconds) I can achieve what seems to be flow and the heater will kick on. The temp gauge will also level out and seem to run properly. This works about 95% of the time, but I've only tested it on short drives to work and back (maybe 15 - 20 miles).
I've primed the hoses and also flushed any air from the system on multiple occasions, so I've tried to cover all my basis. One thing that I have noticed is that after revving it and getting it to function so I can at least get to my destination, the heater will run VERY hot. Like it will burn your hand if you hold it in front of the vent for more than a minute or two. Unfortunately, when it overheated the first time I just immediately replaced the gaskets because this was the solution the past two times, which held for about 2 years each, so I don't know if this new, weird, problem is my doing or is something that caused the original problem.
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Have 2002 Chevrolet Malibu. Oil is getting into cooling system but antifreeze is not getting into the oil. Cracked block or manifold gasket gone bad or something else? What should I do, repair or replace car?
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I have a 2002 Ford Explorer with AC that is not cooling. The AC clutch engages, then cycles off and repeats the process over and over. With a gauge on the low side port, the pressure rises to around 65 psi when the compressor is off, then drops in seconds down to nearly 10 psi. Does this indicate low AC pressure? I have always seen the pressure pretty much stay static at a certain pressure....haven't ever seen it fluctuate like that from low to high as the compressor kicks in and out.
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At startup, my 2002 Jeep A/C cools normally for about 10 minutes and then stops cooling. It won't cool again until much later, usually not until the next day, and then repeats cooling for about another 10 minutes . Might this be overcharged? I topped it off with gauge last fall.
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I have a 2002 Celica GT and the cooling loop on the power steering that runs out in front of the radiator (or AC condenser) is cracked and leaking. I need to replace it, I have a few questions:
- Where to get a replacement, likely Toyota?
- Find out how much work it is to replace myself?
- Does the system auto bleed any air or will I have to bleed it?
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2002 4.6 SC with towing package... Transmission cooling lines to radiator leaking. Replacing them? How long does it take, can it be done while working on the ground? Any tricks or problems to look out for?
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