Sonata I45 (LF 2015+) :: Master Warning Light With No Message
Oct 5, 2015
A yellow triangle with exclamation mark illuminated on my dash. Pg 3-100 of the manual has a picture of the light, and the description calls it the "master warning light" and continues: "This indicator light illuminates When there is a malfunction on the low washer, Smart cruise control, and so on. To identify the details of the warning, look at the LCD display." Later in the manual there are examples of the light going off together with LCD messages, so I know that's what this light is called.
There is no message on my LCD display. When I first bought the car, I set the car to remind me at 5000 miles about getting my oil changed (I drive mostly highway, long trips etc.) For the last week, the car's LCD has been reminding me that i'm due for service in X miles. Today, I hit 5000 and the messages stopped. Around 5050 miles on the clock, the yellow triangle warning light went off, with no explanation on the LCD.
Bluelink diagnostics also reports no errors. Is it just the oil change interval that I set and passed?
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I have a very strange issue with the car, it started last week once the weather had cooled down. Over a 3 day period when starting to drive the car from a cold start, after 30 secs, the following 3/4 things would happen.
The master warning light starts flashing with beeping
Message on the console 'Warning Key Detected'
Interior front courtesy light comes on for a few moments then goes off.
This continues until you stop the car. Turn it off. Wait then start again. Once going again it happens all over again. Until the car is warmed up, then it stops completely.
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The airbag warning light came on last week and stayed on for my hour commute home. Later on that same evening, I took the car out again, and the light was off. Stayed off for about 3 or 4 days and now comes on intermittently. I called the dealership today to try and set something up, and they said if if it's coming on intermittently, check under the seat for anything obstructing the airbag sensor and whatnot. I looked today and found nothing (I keep my car extremely clean) but none the less found no issue. The service advisor from the dealership also said that I need not bring it in unless the light stays on all the time. But I'm insisting on bringing it in in the next few days. I'm just concerned that either the airbags may inflate without cause, or may not inflate in the event of an accident. Should I wait until the light stays on? Going into the service department at my local dealer is always at least a 2 hour ordeal and they don't issue loaner vehicles unless they absolutely have to. I just don't want to waste my time.
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Experienced an incredible failure this morning when I went out to start my 2015 2.0t Ultimate. Foot on brake, press start. Engine starts and the car icon in the middle of the instruments shows the system scan. Scan completes and all warning lights stay on. The LCD panel starts to report system after system has failed ... SCC, EPB, FCW, RPD, LDW, a veritable alphabet soup of abbreviations. Put car in gear and pulled out of space to see if that would have any effect. Turning wheel very heavy as if power steering has failed. No effect from moving a few feet. Couldn't get back directly to my parking spot so carefully around the block to get back to my space. Rear view camera came on when in Reverse but it remained on after shifting into Drive.
Back into park. Turned off engine. Tried to restart. No dice, won't even go through the start cycle. just all the warning lights on and LDW Failure on the LCD panel. Arranged a tow to the dealer and when the tow truck arrived we discovered the Electronic Parking Brake had automatically engaged even though I intentionally had left it off and there was no way to release it. Battery appears to have plenty of power so unlikely it is a low battery issue ... the two times it did start it turned over without hesitation. It's behaving as if the computer has been totally scrambled. There used to be a joke around that if Microsoft made cars, all the instruments and warning lights would be replaced by a single big red light in the middle of the dash reading "General Vehicle Fault" and it seems like that's what mine is telling me.
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In my one-owner purchased-new 2005 Prius w/ 74K miles and w/ no maintenance/accident history other than doing all scheduled maintenances at Toyota Dealers along w/ recalls applicable at each time (other than we had Toyota replace the 12V battery last year just because I knew it would die at some point anyway and I don't like pushing my luck; I'm not 100% certain if there's been a recall on any water pump for this car and if so, don't believe the dealer has mentioned it), I have the following indicators which appeared all at once while I was driving along at around 45 MPH in no unusual circumstances (80F, dry afternoon, about 30 minutes into a trip of mixed speeds, no loads in the vehicle, no effect on the car while driving):
From Left to Right on the display:
1) Red Triangle - Master Warning Light
2) Orange (Symbol)CHECK - Malfunction Indicator Lamp
3) Orange (!) - Brake Warning Light (but it didn't highlight the word 'Brake' in red)
4) Orange VSC - Vehicle Stability Control Warning Light
On the Screen:
Orange Car w/ the ! symbol - Hybrid System Warning Light
We immediately aimed for the house (about 5 miles away); the car drove perfectly fine, with the engine stopping and starting at lights as needed, with speeds going from the 55MPH we were traveling at the time of the alarms down to 0 and back up thru 35/45 MPH and such per normal off-interstate driving. The battery currently shows all the blue bars, and the engine and hybrid systems showed charge/discharge as usual as we drove. There was no discernible change in the driving reaction of the car to brake, steering, accelerator, etc.
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Just bought a Sonata '15 2.0t sport. 8/10 times I start the car with plenty of gas, a message pops up on the nav screen saying the fuel is low and asking me whether I would like to navigate to the nearest gas station.
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On my way home tonight, I received several messages on the screen that a battery drain is happening and I should start the car. However, it WAS running!
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We recently purchased a used 2006 Prius. The vehicle has approximately 74K on it now. Well the other day my wife went to leave work and pressed the power button while pressing the brake pedal, and the Master Warning Light and brake warning light both came on. The car would not allow her to shift the car so she tried to turn it off and it wouldn't do that either. After about 5 minutes she finally got the car to turn off, and when she restarted the sequence everything went back to normal and she drove home fine.
We called 2 dealers and they both seem to be confused by the symptoms, but one thought that maybe the battery was old on the transmitter. So thinking that might make sense I replaced the battery with a new one.
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My wife and I own a 2006 Toyota Prius that we bought used 2 years ago. a couple of days ago, the master warning light (red triangle exclamation point) and check engine light came on. I took it into the dealer and of course, our hybrid battery was dead - battery and a new ECU required.
Our car is at 99,000 and 32 days out of warranty. Went down the road to atlanta hybrid repair. they were incredibly nice, and said that my computer was fine, but the battery would need to be replaced.
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I was driving earlier today and it flashed twice (about a second and a half each), and then didn't see it again for a few hours. I was going about 40 MPH at the time.
I was driving somewhere else today and when I got to the 70MPH mark (really, between 60-70), it objectively increased in frequency. I searched google and these forums, and the closest thread I can find that shares my ailments was this one:
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So the other day my girlfriend got in her car and it had the master warning light on. we took it to the dealer and now they are saying it is something with the transmission and it would be cheaper to just install a new one. Another thing is how could it be the transmission if i drove it over to the dealer and head no problem with the gears changing, but he also said something about a voltage leak.
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I have a 2001 Prius, my wife went and got an oil change and soon after she left the car shut off and the master warning light came on and it now acts as if the battery is dead ???
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My 2012 Sonota's message center has just recently come up with this message 'Low washer fluid' which will not go away. The car has a low windshield washer fluid light which is not 'on' (to indicate a low fluid situation). I have filled the reservoir which has done nothing to either status (the low warning message, or the low warning light). It seems to me the both indicators should be saying the same thing but are not. The windshield washers are working just fine. I would like to clear the warning message. Is there a way?
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When I start my car the master warning light comes on with all the other lights and then goes off with the other lights. It does not come back on while driving and there is no warning sound with it. This just start happening. It never came on with other lights when first starting it up. I have a 2009 Prius.
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Purchased the car several months ago and have done all maintenance and the car is overall flawless but I believe it to contain the original 12V battery.
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2001 Prius, 182,000 miles... Master Warning Light and brake light came on.....
I took it to the local dealer and they did a diagnostic, and they pulled the codes P0300, P3125, P0301, P0302, P0420, P3006, P3016, P3017. They said I would need to replace the the hybrid battery, the inverter, the catalytic converter, and the spark plugs.
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Today i tried to start my 07 Prius, all the normal start up lights came on, including the master warning light, but the master warning light didn't go off. No other abnormal lights were on. When i put the car in reverse to back out, it wouldn't engage in the gear, it wouldn't back up. When tried to turn it off, it wouldn't respond to the power button, it wouldn't go off. I kept trying and eventually it did turn off.
The other thing that wasn't normal was, with the power off, when i opened the door, from the outside to get in, or from the inside to get out, the car started making the warning beep with the red car door open light flashing. Close the door and it stopped.
I have hardly been driving the car since the end of June, i take it out about once a week to keep the battery charged, and it's been working fine. However, about a month and a half ago, i accidentally left the overhead light on and it was on for a few days, and then the battery would not start the car. Auto Club came out and jumped it and since then, it starts OK
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Recently bought a 02 with 34 K, had been well maintained. Last night it wouldn't start so hubby jumped it (properly). Started right away, making him think that wasn't what it needed. Right after that, the Master Warning light came on, the Car with Exclamation Point in it (hybrid system warning light) and the check engine light. The car runs, but it did die, and I had to restart the car, then seemed to drive fine. We don't live near a Toyota dealer, would a regular mechanic be able to read the codes properly? What else should we consider? Should we drive the car?
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I got this exact warning Monday which is discussed in this thread (linked below) and its problem was a bad inverter water pump while mine seems fine: . Also in the linked thread another whom had gotten the exact warning, but inverter pump was not the problem, believed it meant the Hybrid battery was bad and replaced it. , but mine, at least for now, as discussed below, seems fine.
was about to make a trip, 140 miles, gassed up and when leaving station all these (quoted below) warning lights came on. and the car should have been operating in cold condition still as gas station was only a few miles from home. :
Master Warning Light, Malfunction Indicator, VSC, (!), and Hybrid System Warning on Screen.
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It has now come on 3 separate occasions, a week or more apart. Each time the yellow brake or tire light comes on. The next few times they come on together at start up. Then the triangle by itself comes on, does not clear. First time I was driving up hill. Second time I had just hit a drive way riser (not jarring). Today I was driving on a straight level highway and it came on at around 55 MPH.
Battery had been replaced after first instance. The inverter valve replaced too. Now what? It drives normally. Though it is the yellow brake light that accompanies the triangle Toyota says that codes say battery problems.
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The master waning light came on while I was commuting on the freeway. There was no MIL. I've seen this a month or so ago and, as before, since nothing seemed wrong, I kept going. The last time this happened the warning went away after a day or so. This time it is sticking around. As before, there seems to be no problem with the car -- 80 mile commute, no loss of power, same gas mileage as before. I have a generic ELM327 OBD reader. I tried reading codes but there were none (at least none that it could read since there was no MIL).
Any second source for the Prius Mini-Scanner (or have one they want to sell)? Or, can a regular OBD scanner be trained to read the special prius codes?
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