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I have red triangle on deshboard show on my 2006 Toyota

Customer Question
Hi, I have red triangle...
Hi, I have red triangle on deshboard show on my 2006 Toyota Prius and I can't start the prius if I reset or hit clear button on the ODB2 scanner then Triangle Disapeer and I can start my car it is going on for 2 years already. Is there way you can make a suggestion?
Submitted: 8 months ago.Category: Toyota
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Answered in 1 hour by:
11/15/2017
Toyota Mechanic: Todd M, ASE Certified Technician replied 8 months ago
Todd M
Todd M, ASE Certified Technician
Category: Toyota
Satisfied Customers: 1,901
Experience: Technician at Montgomery Motors
Verified

Hello. My name is ***** ***** I will be assisting you today. I see that you are having starting issues with your vehicle. The triangle simply means that there is a fault in the system. Were you able to scan the vehicle? What are the trouble codes that show up?

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Customer reply replied 8 months ago
It has no trouble codes just upside down triangle only.
Customer reply replied 8 months ago
I scanned the vechicle it has no trouble codes on the odb scanner and each time before start I have to clear red upside down triangle and then vechicle starts and run no problem for about 5 minutes then red triangle shows again and after clearing twice it dissapears for good untill next shot down. I been driving like this for over 2 years. Please advice.
Toyota Mechanic: Todd M, ASE Certified Technician replied 8 months ago

I am having issue with my computer. My apologies. I will opt out to allow another expert to assist you.

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Customer reply replied 8 months ago
Okay. Sounds good.
Toyota Mechanic: Pascal Flemming, ASE Certified Technician replied 8 months ago
Pascal Flemming
Pascal Flemming, ASE Certified Technician
Category: Toyota
Satisfied Customers: 13
Experience: Auto Technician at Checkered Flag Toyota
Verified
Greetings. My name is ***** ***** I will be assisting you today.
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Toyota Mechanic: Pascal Flemming, ASE Certified Technician replied 8 months ago
The previous expert was correct in stating that the red triangle is a failure. More specifically on hybrid vehicles it usually means that the main battery is failing
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Toyota Mechanic: Pascal Flemming, ASE Certified Technician replied 8 months ago
Have you taken the vehicle to a Toyota dealership to diagnose the issue?
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Customer reply replied 8 months ago
No I am back yard mechanic and not taking my toyota to dealerships. Red triangle is can be battery but there is an other specific battery light color red that is not on(It has picture of the battery I had that on several times and it was rebuild it is not a battery). I rebuild battery but red triangle stays on before each start for years...
Customer reply replied 8 months ago
Battery and high voltage relays already was replaced from other prius.
Customer reply replied 8 months ago
I keep driving like this just resetting (clearing) odb after each shot down. It has not showing any codes present but triangle keeps popping up. Please help.
Toyota Mechanic: Pascal Flemming, ASE Certified Technician replied 8 months ago
Just to be specific I'm not talking about the auxiliary battery. That's used only for starting the engine. I'm talking about the main battery which should be under the back seat. The battery light is mainly on if you have a weak or failed alternator
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Toyota Mechanic: Pascal Flemming, ASE Certified Technician replied 8 months ago
I work at a Toyota dealership and we have tools to specifically diagnose issues like you're having
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Toyota Mechanic: Pascal Flemming, ASE Certified Technician replied 8 months ago
Given the high voltage (200 to 288VDC) involved here I wouldn't recommend attempting to fix it yourself. Involved wiring is color coded Orange
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Customer reply replied 8 months ago
I understand that dealership has Toyota tool. I did buy mine in autozone it is $200 code scanner and it is showing no codes present. Both auxiliary and high voltage batteries are working fine it just each time i have to reset obd in order to start my toyota. By the way I did approximately over 60000 miles by each time resetting the odb before start because nobody can't seems to help and car worth only 1500 so I keep driving and was curious if you can help. But sounds you don't know what is going on.
Toyota Mechanic: Pascal Flemming, ASE Certified Technician replied 8 months ago
I'll do something extra for you. I'll check my system at work Friday morning when I get there to make sure we didn't miss anything...
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