Prius (2004-09) :: High Coolant Temperature Warning After Maintenance Work
May 19, 2011
I was driving my 2007 Prius on the freeway this morning after picking it up from my mechanic and the high coolant temperature warning light came on for ~4-5 seconds but then disappeared. I was able to safely drive it another 5 miles to work and park. My mechanic changed the engine and transaxle fluids in my car (along with pcv valve and serpentine belt replacement, engine oil and filter change) just before, so we think this could have been due to an air pocket in the coolant system. I will need to check the coolant level once the engine has cooled down and refill if necessary. I plan on driving it around locally before going on the freeway in case the warning comes on again.
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Just bought a 2002 Prius for my daughter at an auction and the car has been driving fine the last few days even though the hybrid warning light has been on and off. Found no fault code with OBDII. Found out later from Toyota service history the cause of the hybrid warning light was a leaked hybrid battery. The previous owner disposed the car off at the auction before the problem was fixed.
I was driving today and the coolant high temperature came on and I can't rev/drive. Stopped engine and re-start after a while and coolant high temperature warning light gone. Drove a short distance and coolant high temperature warning light came back on. Used a OBDII and found no fault code. Radiator hose by the radiator cap is cold but hose at the top right side of radiator by the hybrid system is hot. Opened radiator cap and it is full of coolant.
The car has been serviced on 12/26/2012 before it went to the auction. Can air pocket trapped in the radiator cause this coolant high temperature warning light and can't rev/drive problem. Also today is the first time we didn't use the heater. We used the heater to defog the windscreen and heater work.
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2005 Prius...113k miles...master warning light & a coolant temperature briefly light up several times while commuting. The inverter coolant tank stays full, but the motor coolant is empty every day after a 30 mile commute. I fill it up & 30 miles later it is empty. There are no puddles or evidence of a leak while parked in the garage.
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Since 2-3 weeks ago indicators show about 105 C degree of oil temp and the same 105 C grade on colant temperature gauge. Isn't it too high? I do not remember values indicated month ago but I suppose were lower (about 90 C Degrees). When I stop on light it comes down to about 100 and little below, but running on 140km/h on motorway - 105 C. On uphill I observed even 115 C degree on oil and coolant. It is too high in my opinion. Could it be cause by sharp winter (-20 to -10 C degree) in Europe? I'm not sure indications will go to normal (~90 C) on spring and summer! My engine is V8...
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I was driving and noticed that my temperature gauge went close to the warning zone so I blasted the heat and it went back down. When the car cooled I popped the hood and noticed that the coolant reservoir was pretty close to full but I couldn't see any coolant in the radiator. I filled the radiator with water for now but it looks like it gone again. I cannot spot any actual cracks or leaks on the hoses but I did spot a puddle of coolant in the groves on top of the transmission. The closest hose I can spot next to the puddle is the lower radiator hose but I really do not know too much about cars. I also noticed a hissing sound today coming from the radiator cap, which I am going to replace. Where the leak could be which is causing the puddle on top of the tranny?
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I was driving my fiance to work this morning in my 2003 VW Beetle when the high temperature warning light came on and beeped. A little bit later the oil pressure light came on as well, but only for about 30 seconds and then shut off. We had been driving for about 15 minutes and were on the highway when this happened. There was no steam coming from the engine. We were right by where we needed to be so I pulled off the highway and into the office complex which was right off the highway and checked the coolant and oil levels. I just had the oil changed maybe two weeks ago and the oil level is fine. The coolant level looks perfectly fine as well.
I let the car sit for a while and then drove it back the two miles to get home. A few minutes after starting to drive the high temperature light came on again. Still no steam or anything but there was a slight burning smell after I stopped and went up to the front of the car. I'm not driving it until I get it fixed, whatever it is, but I don't really have much money to do anything until next week. What the problem might be? I've only had the car for about five months or so and it has just over 100 k miles. I don't think there is any kind of leak, because before I got my oil changed two weeks ago I got it changed somewhere else and they didn't tighten the oil filter enough and it was leaking oil.
So I took it to another place to get another oil change so they could fix the problem. I told them about the leak and they said they would check to make sure that it wasn't something else that was leaking and they didn't find any problems other than the oil filter. I have never had any issues with the car overheating either. And I don't know if it's just me being paranoid, but while I was checking the car out after I got home and it had been sitting for a few hours, I turned the engine on for a second and it seemed to be making a bit more noise than normal. Not really anything out of the ordinary, just regular engine noises, only louder.
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I went to my local Autozone today to have a code read and get the freeze frame data. I got a code P0118, Engine Coolant Temperature Circuit High Input. I called the dealer but they are out of stock on the sensor. Would it be a problem to use an after market sensor? I'm just concerned about the quality and accuracy of the sensor.
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Engine light is one for about a month and finally got an ODB II.
Today it reads the error code [b]P0118 which is [b]Engine Coolant Temperature Circuit High Input
The coolant sensor reads 45 C when the key is on "on" position at about 2:30 pm this afternoon and I start the engine about 2 mins the temp jumps to 68 C, are these some logical number?
Does it mean the bad temperature sensor and I need to replace it?
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My 2007 Prius with 162k miles had an Inverter Coolant Pump Failure Monday 6.5 hours from home when my wife was driving it home from a trip. Red Triangle, (!), vsc, and check engine light. She was able to make it about 20 minutes to a dealer where it was diagnosed. Luckily no further damage was done to vehicle. Yes, she should have stopped but continued on since car was driving OK.
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I have a 2006 Prius with 176k miles on it. I drive it about 65 miles each way to work every day. If I really baby the throttle, no warning lights ever come on, and the heat will take about 45 minutes to kick in. If I use the gas a little more aggressively, the heat will start working after about 30 minutes when I get on the freeway and speed up, BUT the high temperature warning light will intermittently come on. First, the red triangle Warning light will come on, followed by "PROBLEM" on the display followed by a red temperature indicator.
Typically it flickers off after just a few seconds, but sometimes the temp light stays on for longer, maybe 30 seconds or a minute before it shuts off. Then it continues to go on and off every few minutes for as long as I'm on the freeway. It doesn't seem to be directly related to when I hit the gas. I have checked the coolant level and it looks fine.
I bought the car back around 2010 when it had just received it's 100k mile maintenance and they had also just replaced the water pump. I haven't looked at the OBD-II codes, if there are any. I have never replaced the 12v battery. The lights are pretty annoying/alarming and I'm not sure if it's "normal" for the heat to take 30-45 minutes to come on. Maybe the 12v battery or the inverter pump need to be replaced?
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My 2004 Phaeton has 167,000 KMs on it right now, but the maintenance schedule on the user manual ends at 166,000 KMs, I have checked with the VW dealer, they said once the car goes pass that mileage, you just start over again, treat it like a new car, i wonder if this is true?
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First background: G2 car has 215,000 mi and recently got P1121 scan code, so I replaced the coolant control valve. that's when high coolant temp and no cabin heat started.
on CCV top nipple connected to hose that had a dot on it and hose goes under inverter cover on right, next nipple down went to hose slightly to left of first hose, bottom hose goes to thermus can. initially ran car in diag mode with high heat, no heat in cabin.
so I got a Autel 519 scan code reader and I see now that the only code is a P0505 (idle air control malfunction)
taking car down my road for short test run, I turn off cabin heat completely and watched the ECT. after a while it climbs to around 220, then while engine is running quickly goes to 245F then 260F. At that point in time (around 245F) the high temp indicator lights up, temp stayed at 260ish so I return home. With car in park, cabin heat off - the temp returns back down to 220F. if I rev the engine temp again climbs.
I have gone through all suggestions, open radiator bleed valve, manually 'pumped' coolant hoses, turned on/off high heat in cabin and finally with car off removed and jumped the CHS multiple times for about 20secs.
Have purged the coolant system over period of days and coolant appears to be full as level is near top of radiator cap, no bubbling, no gurgling.
However 2 mentioned problems continue... I am starting to suspect coolant thermostat but it would seem strange that it would go at precisely the same time as coolant control valve.
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It was a cold winter in Boston in the last two months. And since then almost every time I started my 2005 Prius, the temperature was default to 75F. Also, the first time I start the car in a day, it almost show the outside temperature as Celsius instead of Fahrenheit unless I press the screen to display something else and then come back, then the Fahrenheit will come back.
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As a Prius driver, I have driven my 2012 Prius more than 110,000 miles. I love the car and have a suggestion on improvement - Create new software to allow the driver to monitor engine coolant temperature and RPM from either the dash display or touch screen display.
I like knowing if my car engine is up to temperature before punching it on the freeway ramp or about to overheat before an idiot light goes on.
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It has been documented that the computer will let the ICE coolant cool to a lower temperature before mandating it to fire up again to maintain that lower limit.
Why isn't this done in other modes? Is this compromising anything when it comes to emission or engine protection? Since full power is available in ECO mode, one can force the ICE to drive with full output, even when it is a little cold.
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The outside temperature is reported inaccurately by your C? I now automatically deduct 5 degrees from whatever my C tries to tell me is the temp. I may mention this at my 5,000 visit to the dealer because I'm wondering if the sensor is placed too closely to something creating warmth. But....it's definitely reading too high.
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My 2004 RX330 which has gone many years without a problem suddenly has instrument panel gremlins.
I started the car a couple of days ago (it had rained during the day), and the airbag light did not turn off. Then the TPMS warning light came on, the water temperature gauge dropped to zero. The AC controls stopped responding. Since I needed to get home, and the car seemed otherwise fine, I drove home, after a few minutes the transmission "D" drive light went blank and the instrument back-light went to full brightness.
A few minutes later, all the warning lights went off and the back-light went back to normal. The AC controls still seemed to be off. A few minutes later the airbag warning light came back on, followed by the TPMS light and the back-light went to full brightness again. This cycle kept happening all the way home.
The next morning, hoping the problem had been some errant water getting into something, I started the car, opened the driver's door to get something and got back into the car, closing the door. The light showing the door was open stayed on. I put the car into reverse, the doors did not automatically lock as they usually do. I turned off the engine and restarted it, most of the other lights were off, the doors would lock; airbag & TPMS light came back on.
It has stayed that way, except I also get the A/T temperature warning light coming on periodically, and after some cycle it goes off.
I borrowed a car code reader, it does not seem to show any error codes. In reading some other postings it has been suggested that the Brake light switch is the cause, but the brake lights come on/off without any problem.
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Pressing the power button has no effect. What did I do?
Changed the serpentine belt
Changed the ATF
Drained the inverter coolant
Put in a new inverter coolant pump
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I have a 2006 Prius. I must admit that I've never been satisfied with the A/C performance, but now I'm even less impressed.
I had the A/C system serviced at an "after market" place as our dealership calls them (about 2 weeks ago). They added just under a half pound of coolant, oil, and UV dye. The system was much improved after the "after market" shop serviced it and stayed that way right up until it stopped cooling. Two days ago, the A/C stopped cooling and I'm in town so I stop by the dealer. They do the same basic checks I did with the same results - checked the fuses-OK, checked the lines and connections with a UV emitter-OK.
They evacuated the system - removing 0.16 pounds of whatever was left in the system - and recharged the system with 1.06 pounds of 134a, etc.
Neither of us could detect a leak, assuming there was actually dye in the system.
There is no problem with the compressor .
They see no other issues with the A/C system, it was just out of coolant.
Where did the coolant go and why is there no visible evidence of a leak?
Aside from monitoring its effectiveness and checking for dye leaks, is there anything else I should check?
Should the sight glass have enough dye exposed to detect inside the system with the UV emitter?
What should I see (or not see) in the sight glass?
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The maintenance required light on my 05 Prius just came on and I can't figure out what's wrong with it. I checked every single thing under info>>>Maintenance but no luck. I have a 110 miles trip planned out for tomorrow.
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Reset the maintenance light on a 09 Prius
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