What does it mean warning light TRIANGLE WITH SNOW on TOYOTA PRIUS 20 dashboard

STOP engine light. There is something seriously wrong so do not operate/drive the vehicle before finding and repairing whatever is causing this light to come on!

VSC ABS and ! lights plus red (!) - Toyota Prius Forum ...

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Jun 3, 2008 - 8 posts - ‎3 authors
If the accumulator fails, you will get a red brake warning light and the pump will now run continuosly until it burns out. ... hydraulic pressure to the brake system and "no"red warning lights. .... Fog Lights, PassGas, Toyota Prius General Discussion, 4, 10-13-2005 09:12 AM ... 11-13-2015 10:01 PM by Tim Lee.

Alarm with Brake Light, ABS, VSC and amber warning lights ' PriusChat

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Jul 26, 2005 - Later that same day - I started getting an alarm - as soon... ... Gen 2 (2004-2009) Toyota Prius Forums > Gen 2 Prius Care, ... Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by NorthStar, Jul 26, 2005. ... I am getting the red BRAKE LIGHT, the amber waming symbol, ABS, and ... VSC, ABS, (!) and emergency brake light on
Feb 5, 2010
Brake, Brake warning, ABS, VSC appear
Oct 5, 2008
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Orange triangle sign is called master warning light. When this happens get your car be scanned with the help of diagnostic computer to get to know the problem in any of the systems.

The Triangle indication:
Description: MASTER WARNING LIGHT.
The battery ECU has a self-diagnosis system. If the computer, High Voltage (HV) battery system or the components are not working properly, the ECU carries out a diagnosis to detect the malfunction, and illuminates the master warning light in the combination meter together with the HV system warning indicator on the multi information display.
NOTE:
The master warning light illuminates when the HV battery system fails and it blinks when in inspection mode.

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This the hybrid master warning light, which means the system has detected a malfunction, there are many causes that turn the light on, there are about 24 computers involved, the best advise I can come up with is that you have the toyota dealer check this and diagnose it, this may also still be under the powertrain or hybrid vehicle warranty

The only fast solution is to drive to the nearest AutoZone, they will decode the engine light, and will give you a print uot of the code and code explanation, for free. After you will find out and decide to continue the trip or other options. Good Luck.

This light indicates that at least 1 of your tires has lost 25% of its pressure. Check & inflate all tires to desired pressure then reset the sensor by pressing the button on the bottom left of the dash.

The triangle with an exclaimation mark in the middle is the Master Warning Light . I havn't had time to check out exactly what it is but is is covered in the service reminders part of the owners manual. Google " 2005 prius warning lights . In the first result , you will find a link to toyotapartsandservice.com where you will find owners manual's etc. ( in english )

I have same engine problem. Triangle signal pop up after I try to start my Prius with a still wet air filter to the car . The engine just run for less than 30 sec. and stopped with the triangle signe pop up. I think this sign will pop up whenever the engine detect certain major function failure. For my case, it was due to retricted air supply to the engine. I have tried Lovebytes suggestion and the triangle sign disappeared with a dry clean filter. My Prius is running good now. This warnig sign may have other implications. Once you try this method and sign still come on. You need to have your car check by garage.
Bellow attach is the answer from Lovebites

posted on Aug 21, 2008 Asker's Rating
Lovebytes
Rank: Apprentice
Rating: 0%, 0 votes
I had the same problem. I unplugged the relays from the fuse/relay box under the bonnet. (Top left side) and replaced them. The problem disappeared. (2001 Prius 109,000 miles)