Prius (Gen 3) :: Battery Cooling Fan Constantly Runs At Every Highway Trip
Aug 25, 2012
The past week I have noticed my battery cooling fan running constantly on all highway trips - 20 mile one-way trips going 65-70MPH.
The performance of the battery doesn't seem be degraded, but it seems like the battery is hopping more between charging cycle or whatever you would call it , where you watch the instantaneous MPG on the highway drop down for 10 seconds to 40-50, then back up to 60-70.
The car is a 2011 Prius III. It did not run like this earlier in the summer in the same weather conditions, I would hear the fan maybe once every few weeks in hot 90 degree weather. Now I hear it constantly. This is my first summer owning the Prius so this may be normal, but I wanted to double check with you all if this is a sign of premature traction battery death or something.
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Some years back my "farm" '05 prius when a host of bells and whistles went off, cooling fan ran more than normal, and I lost power a couple of times. Turned out this farm prius had an accumulation of dirt, dog hair, hay and other debris that needed to be cleaned out. You got me through the whole process, and the car's run fine until.... . Fast forward a couple of years to 200,003 miles. Now the cooling fan is running pretty constantly, the red triangle stays lit, the check engine light comes on, the (!) is on, and the VSC light is on. Haven't hooked it up to check codes, but did check cooling fan and it's clean. Would it possibly possibly better to change the 12 volt battery?
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I can usually find what Im looking for with a quick search but I have had no luck with this issue.
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I had my AC charged and belt replaced after this all is done I noticed the cooling fan likes to run a bunch now - its 80's outside and the cooling fan runs all the time.
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If you remove the battery contact (effectively removing power to the car) does the trip odometer reset? Just wondering, as I plan on doing a relay install for my HID setup.
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I drove my car on a short road trip yesterday. We drove 75 miles to one direction, were there for 5 hours and then came back on the same 75 miles. Everything was fine.
Now when I got home I went to sleep. I got up 7 hours later and went to go check on my car. It was locked as I always leave it and the keys were not in the ignition. But there was a distinct electronic sound coming from the battery. Like a small motor running. It was odd.
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2008 Prius gen ll.. I had to take an unplanned out of state trip this week. For most of the highway time (2 days each way at +/- 65mph) the hybrid battery was almost always fully charged(green bars). The arrow every few seconds pointed towards the battery indicating charging even though the battery showed all green bars. Every now and then, several times per minute it would out pulse a short blast of energy to the system but not enough to bring it down to blue bars.
MPG was down about 10% . P>G didn't seem to except when I was in town. Taking my foot off the gas pedal didn't always result in the 99.9 indication unless I was going down an incline. I went from Northern Michigan to South Louisiana so temperature wasn't the culprit. The only thing different is that my 12v ignition battery failed just before leaving and the dealership replaced it.
At normal speeds, when I pulled off the interstate for gas/food/sleep the system worked OK, blue bars charging and discharging and good gas mileage. P&G worked normally. I've had this car for 5 years now and only a few times over that period have I noticed the hybrid battery fully green.
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2000 1.8t ATW/AEB auto. We completed the motor swap and the car ran/runs perfectly. Everything functions but just outta the blue the aux fan decides to run when the key is on the on position. And no the A/C is not turned on.
Pulling relay 214 does nothing! It still runs. Pulling ALL relays does not do anything...it still runs. It has constant voltage to it while the key is on. The car runs perfect otherwise but the aux fan is incredibly loud and makes the driving experience suck.
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Prius OEM fan control - EAA-PHEV It seems like at least in the Gen II, the battery fan is quite "lazy" and comes on way too late just like most variable speed fans in electronic equipment.
In the Gen III, does the fan have the same problem? If so, is there an easy way to perform the mod that can be easily undone?
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My inverter over heated. Looked at reservoir for motion of water saw none. Took car to toyota for pump recall. When I got it back I heard the pump. Never heard it before. I don't think it ever worked. & water is flowing in reservor now. Now I am thinking about the HV bat. fan because I never never ever heard it working. When does it come on and how could I test it?
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I've decided the first issue w/ my new-to-me jetta I want to focus on is the cooling fan constantly running. I suspect this is potentially related to the temp gauge not reading anything, which I suspect might be because of the coolant temp sensor.
So basically, when I turn the key to on (I'm pretty sure it's on, not start), one of the cooling can comes on. It's the fan on the right side as if you are sitting in the driver seat. I've been looking at the wiring diagram for this issue as well, and the only other thing I can think of that isn't a computer involving issue would be the thermo switch. But it seems like both fans should be coming on in that case, and it's definitely only the one fan that is coming on.
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How often should the traction battery cooling fan come on? It started to be warmer here in FL, and I hear this fan more often now. I bought my 2011 in December and up until now almost never heard this fan working. Now it comes on at least couple of times a day, mostly under heavy acceleration in Power mode.
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I need a way to make my both fans be on constant during track days, I know induction makes a fan kit for the mk4 r32 which works great but the controller in the MK5 is different and the kit don't fit.
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I have a 08 2.0 CRDi and my radiator fan runs constantly on high as soon as the key is turned on and stays on high until I turn the key off. Have found the fan controller and wondered if that might be faulty but don't wont to replace it for nothing. also where is the temp switch is on the engine or radiator?
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First time I've ever noticed it at least. And she's been on 2 huge x-country road trips with much hotter temps than the other day.
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2010 4x4 F150 Lariat 5.4 L, have been working on throttle response problems off and on for a few months. Initially got p0404 codes, and replaced the accel pedal assembly, now graduated to p2135 code, and stall at idle after a highway trip. Wondering if this may be a issue with aftermarket air filter causing misread errors on sensors. Had it to the dealer, with out any real remedy.
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My 2006 Prius battery runs down regularly overnight. It seems to be something connected to the immobiliser and/or the interior lighting.
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Lately when I turn the AC on my battery runs all the way down to two purple bars. The temp here is hot and it happens when I'm traveling at low speeds. The battery finally gets back up once I drive faster.
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We took our 05 Prius to the mountains on Sunday. Coming down the hill from Lake Tahoe the temp climbed to 98. Suddenly we got the red triangle warning and the Hybrid system warning light. The car ran fine and showed no symptoms of any problems. We took the car to the dealer Monday morning. They Read the code P0A82. They said the Battery cooling fan was not coming on and blamed the problem on dog hair. The warning light was off. The car ran fine going home with no warnings. My questions
1) Can/did the dealer reset the warning light?
2) Is there a way to verify that code P0A82 is a bad cooling fan.
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My dad has a 2015 Prius v Three (lowercase v and three, not III). He just hit 7,500 miles. He had the service done at 5k miles. The error message that popped up on the dash today says, "Maintenance required for hybrid battery cooling parts at your dealer"...
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Purchased a 2006 prius not too long ago with just over 100k miles.
I like the car, I average about 42-44 mpg. It is really for my commuting. The question I have is it seems like my brake pump runs all the time. When I take my foot off the brakes, it runs, when im in a drive-thru, my battery drains super quickly, however if i put in park instead of leaving it in drive while in the drive-thru, it does not.
My only thought is there is something wrong with my brake pump and the way it drains batteries.
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