Prius (2001-03) :: Master Warning Light Came On While Commuting On Freeway / No MIL
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?
Prius (2004-09) :: 2006 - VSC / Brake / Master Warning And Hybrid Light On
I just purchased this vehicle from a private owner, and the first day everything seemed fine. After a few days I get all these warning lights - Master Warning (Red Triangle !), VSC, and the Brake Light, plus the NAV screen shows the red car with ! in it. The car seems to run just fine though. I don't notice any performance issues. One thing I did notice when I purchased the vehicle, the previous owner had a batter charger in the trunk before he took it out.
Now I've check the batter using the LAN Monitor and it shows like 12.1 volts when I turned the car on (not started). I decided to give the batter a deep charge overnight (2 amp charge) after disconnecting NEG terminal from car. It cleared the codes for a little while, but then they came back. My ODB II tester shows no codes, only codes I found on the LAN Monitor was for NAVI - 01-e3 sub 00-5. Do I need to replace the 12v Battery?
Prius (2004-09) :: 2006 - At Start Up Master Warning Light / Brake Light Comes On
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.
Prius (2004-09) :: 2005 - Master Warning Light / Malfunction Indicator / VSC / Brake Warning Light Came On
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.
Prius (2004-09) :: Master Warning Light Comes On And Off
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:
Prius (2004-09) :: Master Warning Light Came On
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.
View 2 RepliesPrius (2004-09) :: Master Warning Light Came On / Car Won't Engage In Gear
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
Prius (2004-09) :: Master Warning Light, Malfunction Indicator, VSC Came On
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.
Prius (2004-09) :: 2005 - Master Warning Light Keeps Coming Up
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.
Prius (2004-09) :: Master Warning Light Comes On When Start Accelerating
I have a 2004 Toyota Prius with 95k that I would like to drive to work everyday. Only problem is that after the car warms up(2-3 minutes of driving), whenever I gas the car to go the Master Warning Light comes on, and as long as I'm gassing it stays on followed up by a picture of the oil lamp comes up.
Now if you stop accelerating than it goes off and comes right back on when you start accelerating. I'm new to these Prius. I checked the engine oil level and it is almost full. I took the car to the shop and all they said was that the transmission was overfilled.(but they did not drain the fluid to bring the transmission oil down.) Is it possible that the oil picture on the top left of the Navi display is caused from overfilled transmission fluid?
Prius (2004-09) :: Master Warning Light / Red Triangle Exclamation Point And Check Engine Light Came On
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.
Prius (2004-09) :: Master Warning Light / VSC And CEL - Clunking Noise When Engine Came On
Today we had the oil changed and everything was good, drove to the hardware store and when we came back I put a heavy box of tile in the truck (I set it down hard, it was heavy). We then started it up and backed out and noticed the master warning light along with the vsc light and check engine light. I stopped it and checked the oil and all was fine. Started it back up and lights still on. I drove it across the street back to the oil change place and when we got into the parking lot there was no gas pedal. Pushing it all the way to the floor and it barely made it into a parking place and the battery on the mfd showed 1 bar.
When we restarted after a few minutes and when the engine came on it made a clunking noise. The guy from the oil change place came and cleared the codes. I didn't write them down like an idiot. After the codes were cleared it started fine with no noise and ran around the parking lot fine and has run perfect since (8 miles). I forgot that we put gas in as well in between the oil change and hardware store. The gas cap seemed fine. Is it possible the slamming of the box of tile caused a fuel pump inertia switch to cause all this? Could a loose gas cap cause this? It has been perfect since we bought it new with zero problems till today.
Prius (2004-09) :: Master Warning Light Would Come On When Slowed Down Fast - Sudden Oil Use
My 07 has 149K on it and I never have checked the oil. I do have it changed every 5K and no one has ever mentioned it coming in low. My last oil change was at 145K and about 2000 miles later the master warning light would come on when I slowed down fast, especially if there was a turn. I noticed this on the twisties driving up the west coast. The problem then went away after a couple hundred miles. Then recently it started doing it again and so I checked my fluid levels everywhere just in cast that might be throwing the warning light and found my dipstick was bone dry.
I am surprised the warning was so general. Why not an oil light? or an oil pressure warning? WHen the master light came on, the screen just said "problem". Kinda vague for such a specific and important matter. My guess is that the oil got so low that the oil pump sucked some air due to the acceleration when cornering or stopping. (negative acceleration).
My question is what would make it start using oil suddenly. True I didn't check it b4 so I have nothing to compare it to, but as we all know, the Prii do not use much oil and if in fact it was so low that it was sucking air 2000 miles after an oil change, they either forgot to add oil or else it started using the 1 qt/ 600 miles that the owners manual tries to tell us is normal. I seriously doubt they shorted me on the last change. BTW I added some oil ....
Prius (2004-09) :: Master Warning, Check Engine, Yellow Brake Light Came On
2006 Prius with 164,000 miles.
First in the morning, starts fine, 500 feet later I'm turning out of neighborhood and I get lit up with:
Red triangle master light
Yellow brake warning (went away after I did signal check)
Check engine
Maint required light
The maintenance light is on because I'm 5,000 miles out of an oil change. I checked the stick, it did appear low, so I added a half quart of mobil 1 5w-30.
The inverter pump was changed due to recall in 2012, and I do still see turbulences in the fluid.
I have 3 pips of gasoline in the tank.
The 12V is a newly replaced yellowtop from elearnaid. Replaced about 1 year ago.
Prius (2004-09) :: 2008 - Master Warning Light Came Up Four Times During Normal Braking
for the last three days, I had the big red master warning light come up four times during normal braking, also "Problem" was displayed on the LCD where "Add fuel" is displayed when fuel is low. But no error code showed on the OBD reader. I searched found that it might be related to 12V battery which I replaced two years ago.
2008 with 120K miles.
Prius (2001-03) :: Master Warning Light Came On
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 ???
View 1 RepliesVolvo :: 1996 / 850 Turbo Wagon Died In The Middle Of Freeway Without Warning
My 1996 Volvo 850 Turbo Wagon died in the middle of the freeway last night without any warning...I was driving it home after purchasing it from a private seller who is completely ignoring me now (of course). The car ran fine on the test drive and fine for the 40 or 50 miles on the way back home and then suddenly stepping on the gas did nothing and I had to get off the road immediately. I'm 8 months pregnant so needless to say, I was extremely freaked out.
Anyways, I had it towed home. Today I went out and started it and it was a little bit hesitant but it started. The RPMs were bouncing around below 1000 and the car sounded like it wanted to stall but didn't.
I read online to start it and turn the AC on see what the RPMs do and that this can diagnose an idle control valve that needs replacing. I went out and started the car again, blasted the AC and now the RPMs were staying steady at 1000 and the car no longer sounded like it was about to stall. The RPMs did shoot up passed 2000 once shortly after turning the AC on. I'm assuming this must mean that the idle control valve needs to be replaced.
Someone else had posted about their car (same model/year as mine) would die unexpectedly and in their case it turned out to be the mass air flow sensor. I am really wondering about the fuel pump, fuel pump sensor / relay.
Prius (Gen 2) :: 2009 - Master Warning Light Comes On When Car Started
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.
View 4 RepliesPrius (Gen 2) :: 2007 - Master Brake Warning Light On And Off
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.
View 5 Replies