Prius (Gen 2) :: ABS, VSC Yellow Warning Lights Came On / Rust On Rotor


Dec 8, 2015

Last week I bought a 2006 Prius. Two days later I heard a noise brought it to a Toyota dealer and they replaced the right front wheel bearing. The noise stopped. Then about 40 miles later on an interstate the General, ABS, and VSC yellow warning lights came on. I to it back to the dealer (the lights went off when I got off the interstate) and they cleaned an external connection and but said there could be some grease inside and the light could come back on but it was safe to drive. I proceeded and the light came back on. The lights stayed on while driving it about 1,000 miles home.

Then in the morning after the lights came on after driving it about 15 miles, I again to it to a Toyota dealer and diagnose the lights and a little to fix it, Ten 5 miles down the road the lights came on again. I drove back to the dealer and they said something like: "There is a lot of rust on the rotor etc. that probably was loosened when the wheel being was replaced and that is interfering with the speed sensor. And that the knuckle has swelled.

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Prius (Gen 2) :: Big Red Triangle And Yellow Warning Lights Showing Up

My car (2006 Prius with 250k miles) was operating normally all day today. Still getting very good mileage around 52 mpg on average. Then abruptly, the big red triangle and few other yellow warning lights (check engine, VSC, and an indicator with exclamation mark in the middle) showed up while the car was moving around 20 mph.

Now, the car does not have much power and it was very difficult to speed up or going uphill. Turned the engine off and then back on. The symptoms still persist. The battery indicator was at only 1 bar. Let the engine run for a while and the battery indicator went to 3 or 4 bars. Turned the car off and then back on, the battery indicator went back to 1 bar immediately. Also the battery fan was running at high speed, even through I have just started driving for about 5 minutes.

Will do the following tomorrow:

(1) check 12v battery,
(2) use Torque SW to see if HV battery has proper values, and
(3) read diagnostic codes.

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Prius (2004-09) :: Master Warning / Airbag / Yellow Brake And VSC Lights Comes Up

My case involves a 2005 Prius with 55k miles on it with the problem of the master warning light (triangle with !), yellow brake light ( (!) ), airbag, and VSC lights coming on whilst driving. The car drives just perfectly fine without any discernible problems. Scan tool did not detect any codes. Tested the 12v auxiliary battery and it is strong with both voltage and amperage (even went as far as temporarily jury-rigging a fresh v12 battery in parallel with it to see if it would alleviate the problem). Inverter coolant pump runs well, coolant changed with appropriate Toyota Super Long Life coolant (50/50 mix) and system bled. Despite some drivers' concerns over disconnecting the 12v battery to reset the lights, this was done and the lights would go out, only to have them come on again after about 5-10 minutes of driving. Asides from the lights coming up, the car itself seems to be asymptomatic. Hybrid system appears to be running smooth and fine, SOC is good, asides from the lights the car drives very well.

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Prius (2010-12) :: 2011 - Dash Board Yellow Warning Lights Came On

This morning when I started my Prius 3rd Gen 2011, I noticed three yellow lights being on. These were; something similar to handbrake light, ABS light and then the stability control light. All are in yellow. Checked tire pressure and found that one tire was low and filled it. Also, brake fluid was near the low level and I topped it. The lights are still on. I switched on and off several times but the lights are still on.

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Prius (Gen 2) :: Red Master Warning And Yellow Braking System Lights - Code P0A08

My 2006 prius has the Master warning light(red) and the braking system light (Yellow) on while I am driving, and I went to the dealer.

The technician told me that he could not verify any warning lights ON at that moment, and he performed health and diagnostic checks on it. He inspected connection at auxiliary battery and junction box 1. All checked OK at this time. No repairs recommended at this time.

However, the master warning light came on when I pick up the vehicle. The dealer told me that they will inspect it again tomorrow. And they found that there a P0A08 error code. They suggested me to replace the hybrid converter/inverter.. My car can still drive while the lights ON.

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Prius (Gen 2) :: 2005 Toyota Hybrid System Warning Light And Yellow Brake Warning

I've got some issues with my 2005 Toyata Prius (~150,000 miles). My wife was driving recently and the "Master Warning Light", the "Hybrid System Warning Light" and the yellow "Brake System Warning Light" all came on.

Some quick reading of the owners manual said we should take it to a dealer right away, but because it was a yellow, and not red, brake system warning light it seems ok to drive at least to a dealer. in regard to the yellow brake system light the manual said it could be that: "the regenerative brake system failed or that the hydraulic brake system failed".

Now, I have a cheap bluetooth OBD reader hooked up to the "torque" app on my phone and I thought I would try to see what error codes there were to learn more. But strangely, it did not read any fault codes. I've used this reader successfully on my 2001 Mitsubishi galant, but I'm not reading anything for the prius in this case. I'm not sure if there is legitimately no error code associate with the warning lights or if my app is just failing to read them for some reason.

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Phaeton :: Warning Lights Went From Green To Yellow And Red / Beeping All The Time

My wife was driving down our street today, a two way street, narrow at best of times. On one side a monster snow pile ( 6-7ft high), the other side a very big truck coming at her, minimal passing room, like almost touching her mirrors.

The warning lights on both sides went from green to yellow and red ...beeping all the time. The Phaeton stalled. Not once or twice, but four times !!

Question : did the engine stall because of the red beeping lights on both sides sensed imminent danger ? ...... and she kept on going. She thinks so.

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Prius C :: Yellow Brake System Warning Light Came On

At just about 21800 miles and 19 months service this morning the brake system warning light came on. This is the yellow brake system warning light, not the red brake warning light or the generally similar looking yellow low tire pressure warning light. No other warning lights are on in the service indicator panel. What troubleshooting can I do myself before taking it to service facility?

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Prius (2004-09) :: Yellow Exclamation Warning Light Came On While Driving

I can't seem to find my manual, and I'm not sure if I should drive my car home after a warning light came on during my drive to work. It was a yellow exclamation point within a bracket. What this means?

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Prius (2004-09) :: 2005 - Getting Red Triangle And Warning Yellow Symbols?

My 2005 Prius has about 141000 miles on it. The red triangle exclamation point comes on the dash and a yellow exclamation comes on the LCD 1st and then a 2nd yellow symbol comes on the LCD. The problem happens once or twice a day. It seems to start, run, and drive just fine. I do restore antique tractors and I am pretty good with computers and I have some pretty good mechanical know how. Attached are pictures of the lights.

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Prius (2010-12) :: Yellow Triangle And Check Hybrid System Warning

First off I have a 2010 with about 11,000 miles and it has been running great since I got it. This morning I was greeted with the "Yellow triangle" and the "check hybrid system warning". The car started fine and I pulled out of the garage under battery as usual and then the engine kicked in also as usual, everything seemed normal except for the warning lights. Since I have a long commute I just took my wife's car and got to work and did a forum search on this issue. I called my wife and had her turn the car on and off three times and she said it cleared the yellow triangle and check hybrid system but it still had the check engine light on. She also said the car seemed to be running fine and shes driving around town in it. I couldn't find anything on the check engine light. Is it ok to drive it?

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Prius (2010-12) :: Turn Power Off' Warning - Yellow Triangle Flashing

Had a warning flash up last night that I've not seen before. Had just done a reasonably long run from an airport with 3 burly guys and their luggage. Just as I was pulling up to their hotel the car did a continuous beep and flashed up the warning "Turn Power Off" and flashed the yellow triangle. When I was stopped I was in Park and it was still beeping and flashing this warning.

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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.

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Prius (2004-09) :: Main Warning / Yellow Exclamation Light And Limp Mode

My wife and I are driving our 2005 Prius with 130k miles and have experienced some weirdness with the car while driving. We've got the master warning light (red triangle w/ !), and another yellow (!) warning light, plus the center display shows a red car with an !. I've gathered that it means something possibly with the brake controller, so when I parked I put the e-brake on.

The car was driving fine with these lights on (we were in the middle of Canadian highways and couldn't stop anywhere) except that cruise control would not work.

Eventually, it actually went into limp mode, where we would floor the pedal and the car would barely accelerate. Pulled over, turned it off for a few minutes, then back on and it drove fine, warning lights still on.

I just replaced the driver's front wheel hub, and I can hear the passenger front going bad, so I'm suspicious that this may be related. Just replaced the 12v within the last few months with an Optima.

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Prius (2010-12) :: Yellow Warning Light Flash For A Few Seconds And Then Turn Solid

This morning I got a yellow warning light flash for a few seconds and then turn solid after driving on the highway for a few minutes. It looks this: (_!_). It is located on the right of the dash display. I just changed my oil and put on winter tires myself two days ago. I hope it isn't related to my maintenance.

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Prius (Gen 2) :: Check Engine / Yellow Indicator And Hybrid System Warning On Display Screen

I have a 2005 Prius with around 115,000 miles.

I have the following warning lights on:

1) Check Engine

2) Yellow Indicator, looks like exclamation point inside a circle inside parenthesis.

3) Red Multi-information display (exclamation point inside a triangle)

4) Hybrid System Warning Light on display screen, looks like exclamation point through a car

The engine cranks up just fine and drives forward and backward in the driveway fine. Battery level indicator is blue (see image). I checked for turbulence in the inverter reservoir with the engine off and fluid was flowing.

I checked the 12V battery (using the car's measurements by holding Display and turning lights on and off 3 times) and its value was 12.1 volts without engine and A/C on and 11.8 volts with them on.

The fan in the back right passenger seat is always on now though (I don't remember ever hearing this fan noise before), regardless of engine on or not, even though it's only about 80 degrees outside and it's been sitting idle all day and all last night. It comes on pretty much immediately when the power button is pushed.

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Prius (2004-09) :: Yellow Brake Warning Light Turns On For About 8-10 Minutes While Driving In Rain

Yellow brake light turned on while driving in rain, then for some reason turned off. I had read somewhere this may be an indicator of wear on brake pads. I have a 90 mi. commute round trip, I will check again if this turns on and stays on. For now, it is off. what could be causing this?

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Prius (2010-12) :: Yellow Triangle Flashing / Dashboard Lights Up But Won't Start

Gen III, 2010 Prius III ... There is a flashing yellow triangle, dashboard lights up, but won't start. The dome lights won't turn off, in any position.

Drove it last night and drive it regularly, daily. I came out to the driver side door being not fully closed. What's going on?

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Prius (2004-09) :: Triangle / VSC And Yellow Exclamation Lights On With No CEL - Code P0A09

I currently have a 2008 Touring Package 6 with 180k and I am getting weird problems. I am getting the triangle of death, VSC, and yellow ! light. There is no check engine light. On the LCD I am getting the red battery + - icon as well as the car hybrid icon. I scanned it and I am getting a hybrid code P0A09 . All of the maintenance have been kept up and all fluids are perfect. No weird noises and the car is doing 53 mpg. It switches between gas and electric with no problems at all. Symptoms were yesterday with the lights. I cleared the codes and they would come back instantly. Today, I did the same thing and now everything is perfect. I am attaching the pictures of my dashboard lights that were on and the codes I was able to obtain in diagnostic mode.

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Prius (2004-09) :: Yellow Brake, Malfunction, Hybrid System, Master Lights Came On

I have a 2006 prius I got used and in good condition about 3-4 years ago. I never had any problems until a cop pulled me over and it turned out my parents had decided not to notify me they hadn't renewed my registration and my insurance they've been paying had ran out. I've since learned my lesson on keeping up with the dates.

I "luckily" got to go home with just some tickets. It sat about 2-3 months until I could get the money to line everything out. I ran it at least once a week but apparently that wasn't enough? Now that everything's up to date I started driving it and the yellow circle with the (!) in it is on. The Master system light, the check malfunction light, and the hybrid system light is on.

It seems like it applies the brake when I'm driving constantly now. It stalls when I first try to speed up. And the fan? on the passenger side of the back seat is always running for some reason. I tested my battery volt and it's at 9.2.

I took it to an auto shop today in town. I live in WV in the backwoods. And they wouldn't hook it up to check for codes and referred me to a dealer about 30 min. away... I've never had any problems with this car before.

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Prius (2010-12) :: Engine Died During Turn - Yellow Lights On Left Of Panel Came On

I just got a 2015 Prius 4 and during an ordinary turn onto an on-ramp, the engine died. The two yellow engine lights on the left of the panel turned on, but because I had to move along I just turned the car off then on, like a computer and it started right back up. I'm not sure if the electric engine died or not, everything was moving too fast.

I took it in to the dealer today and he said he never heard of that happening and if the engine light hasn't come on since he didn't know about it. I wanted him to log in the info as I couldn't leave the car today, but he said he couldn't do that unless he took it in and had it checked, which I guess I'll do next week.

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