Prius 12V and Hybrid Battery Self Test Procedure 

thank you so much! going to test drive a prius next week and this is very helpful. truly good video and thank you! happy new year! Cheers from California Austin

Thank you for all the info. Blessings

thank you so much for doing this. i just bought 2 cars (one for my wife and one for my myself) and this was my biggest concern. now i have a way to check.

Thank you Very useful video, I just tried this in my prius! thanks again!

Thank you so much. While I got 51.3 mpg on a 2,200 mile trip last summer, I've been worried about a decrease in mileage since only driving locally. The average is down to 43.8. I'm not sure if the battery is going or if it is just that - for the first time ever - my 2008 Prius (with only 50,000 miles) is living out of doors in winter, and has winter tires for the first time. For now I'm not panicking. Thanks, again.

Great video. You can get out of the screen by holding display button as well

Although this is a good way to see what the resting voltage of the 12 V battery is, and also shows if it is being charged, this has nothing to do with the Hybrid driving battery.

Love your car videos, very helpfull. Keep up the good work👍🥇😊😊😊

It is a good idea to make notes of these procedures and keep them in your glove compartment. I got in my car and drove off and notice that the digital clock and the radio presets had reset. I did not check anything out and later, when I had gotten to my destination and then gotten back in my car I had a dead battery. The cause was the 12V battery ground connector had come off completely. When I reconnected it I had to give it a jump with my little battery pack and I was off. I should have checked everything as soon as I noticed digital clock resetting. It does not just happen for no reason

Thank you very much it's really helpful

That has to be an Easter egg... Thanks for the information

Thank you! So helpful :)

Youre a legend. Great help man..

Thanks, useful information!

I appreciate this video. My 2007 has 236k miles with the original batteries and came in at 14.0. Hopefully I can get through the hot Florida summer and make it to this time next year. Wish me luck.

great job, really good info

I’m about to buy a Prius 2007 is good video thank you what did you recommend to check more things

Kindly demonstrate also how to self check the hybrid battery in toyota aqua hybrid

Note, for UK models, the button labels and positions are different. I had to press the CAR button and switch the lights on and off 3 times to get to the diagnostics screen.

Fantastic video 👏👏👏👏👏❤

THIS IS GREAT!!!

The "battery" shown on the Info screen is the 12v I am assuming. Is there a way, when driving around to recharge a jumped 12v battery, to visually tell if you have driven your car enough to charge it? Some say 8 hours driving. I can't drive for 8 hours.

Excellent video! Can you make a video on how to check the hybrid battery health on a Lexus ES 300?

Hi, I have a 2006 Toyota Prius that is not starting (getting in ready mode) but every thing else comes on. I check the battery using the diagnosis method and the volt is 12.3. the only time it starts is if I remove the two battery terminals and hold both connected to each other for few minutes and then put them back on the battery before it starts (get in ready mode). How can I fixed this problem? Please advise

Thanks a lot!!

How can o check the battery is good or not good if I want to buy a used Prius. Thanks 🙏

Hi there, if I check the voltage on my 2005 Prius with this procedure reads 11.2 on the screen but if I check the voltage with my multimeter reads 12.4 which is the correct?

Hey love ur video I have a question see I was teaching my son to drive and didn't realize he was stepping on the gas and break pedals..ijust bought the car a few days ago now I'm having trouble with my car please help

Would this be similar in a 2007 Toyota Camry Hybrid as well? thanks!

I have a question, I have 2005 prius and got new 12v agm battery and show the display, showing 12v or not 12.6v and When i start the motor on, it wont show 14.4v, just 13.7v with new battery. How come? If so Maybe the short charge circuit ? Where that short charge circuit.

What does it mean if the car starts and stays on? It won’t cycle off even thought the battery says it’s charged?

Very usefull... I wanna buy this car, and this will help me lot..

Is there any miles like 150k or 120k when original battery fails need replacement? Thanks

How can I get the big red triangle with ! In it to clear off?

My battery shows 90 to 100% in the morning, and when I start driving, no further than 2 blocks, the Battery drops to one bar. And then slowly builds back up. But lately, it started doing it right after I get off work. The battery gets down to one bar all the way home, for 42 miles. My gas mileage is bad 38mpg. I installed some cheap injectors, and my mpg went to 48mpg, but I got a check engine light. Then, after almost three months, I went back to the old injectors bc the car had some misfiring issues when the car was coming to a stop. I suspect a dripping injectors so with the old injectors, the misfire dissappear but the bad mpg came back.

Thx you bro for sharing this beautiful video. But is it because of the healthy alternator that bring the voltage up to 14.4 volts? Thx

Thank you 😊

Thanks a lot for video. It was very useful. I have one trouble with Prius 2006. Abs module seems like bad, but the dash board is coming on and off. When abs is working dash board coming on. If you know something can explain what is the problem ?

I tried this and although it worked, it gave a much different reading that measuring the 12v battery at the terminals itself (the one in the trunk). 11.9v vs 12.4v.

you can also hold display button and it will get out the diagnostic mode. do in my 07 prius.

Thank You

Will this work for the Lexus CT200h since it's a Prius In a tuxedo?

Thanks bro can you tell me why just sometimes my Prius 2008 shakes and engine light blinking but goes off and again normal drive continues and it happens just some times ?

How do u self test hybrid battery on 2012 Prius two????

Hi!Do you know how the TV works in Toyota prius 04-08.and if you need an extra accessory.am from Cyprus.thanks!!!!

May I ask please if you know any trusted website you can recommend for selling Right Hand Drive Prius?

Thanks for your help. I have some other question, is it possible if I can Email you with question. I am planning to buy Pruis Used who has higher miles like 160K

How do you check it with a 2013 Prius V?

*Thank you!*

nice job

Should I be concerned if I don't have all the battery bars lit up? I have all but the top two bars lit.

Will this procedure work on a 2014 Prius?

At what wattage will the hybrid battery be completely dead? And if it does completely die can I drive the car?

Will the car become unusable if it goes down past 13.5? What happens when driving a prius with a dying battery?

Hi i have a 2008 Prius, and i had some issue on my double screen and dashboard and the issue is the both of them is sometimes is working sometimes its not working, driving is really good but genereally the double screen is not working so you know why do them like that ? Do you know to what is the solution for this issue

I trying to buy one but the triangle light came on lot of other lights the guy said there was Corrosion on the battery connector is this possible why that happen

Thats perfect I'm about to go for a test ride 👌

Is this accurate? These are the exact numbers you get from an alternator powering a 12v battery setup.

2008 Prius I The 12V was dead about 10 days ago, AAA started it and, as per their instructions, I left it c charge at home for 30 minutes. Next day I checked battery through internal diagnostic system and it fine. Between 1.28.2020 and 2.5.2020 I used car w/o problems. Last night it was dead again -hadn't driven it since the day before. I can call AAA again, but would like some advice or thoughts on next move after that/ Thanks

Hi, I was driving my 2008 Prius and the main battery display dropped from about six bars to one bar, then the petrol engine kicked in to try and charge the battery. Moments later the car basically shut down. Petrol motor was spluttering and electrics seemed to have died. On my display it says Problem!

Does this work on 2018 Camry Hybrid LE ? Thanks.

Hi I just changed my hybrid battery 2006 Toyota Prius but I don’t know why the car is run average 35 miles per gallon before my hybrid battery run 50 miles per gallon.I wonder if the mechanic cheat he didn’t change hybrid battery at all ?

Thank you for the video. I have a question. You have a hidden camera option. Why do I have the same? Why can't I connect a camera to the device?

I just put a refurbished battery in my 08…. That has 430,000 miles….I kept getting the triangle with a P08aa code I think…I took the battery out and found corrosion decided to not mess with the modules put the battery in went to my display with the button pushed once it’s at 11.8 volts….Engine on it jumps up to 13.7v while driving down the road it’s about 13.1v….Unless I barely accelerate the engine always wants to turn on up until I replace the battery I was getting about 30-32 Around town and 36 on the freeway…Haven’t gone through a tank a gas yet to see if I’m getting better gas mileage…Can anyone comment and help me out…I’m a 25 year mechanic but this is my personal car very little experience with hybrid… thnx 🙏🏿

Thank you.,

Is it worth buying a 2012 prius hybrid 93k miles for 13k

will it work for a 2014 prius 4?

This works for camry also?

Can we put 2016 prius hybrid battery pack in 2007 prius

Hey buddy!! Nice videos u make. U deserve more views and likes. Etc. Great job!!!! 😁

So I noticed your TPMS light flashing... guess that is a common theme with the prius.

Thanks for the video. Very helpful. If you are still answering questions I have one for you. I live in Australia. (a transplanted Yank) I'm looking to buy a 2014 Toyota Hybrid. It only has 7500 kilometers. It was an Australian government vehicle. My question is about the batteries. Are they still as good as when new or do they go bad if not used much. the car has been regularly service as required by the government even if not used much. What do you think or know about the batteries. thanks. Here that car is for sale for about $24,000 Australia dollars.

Here in Pakistan we get only used batteries for replacement. I had code p3000. So I got my hybrid battery replaced. When I used the method you described. The battery voltage are 12.1 but after turning on the car on diagnostic mode the voltage dropped to 11.8. Hybrid battery display screen also shows sudden drop of bars from blue to purple sometimes when I stop the car for few minutes. And on two purple bars car keeps running for many minutes but the third blue bar takes alot of time to appear. Its not happening always but randomly. Can you give your expert opinion whether the battery is good or bad.

Thank you so much!

Jazzak Allah Hu Khare

Tnx bro but how to check hybrid battery 3rd gen??

Hello sir my hybrid battery cooling fan doesn't work please give me advice thank you

I put 14 in 15 size tires on... car slows down... what next...ty..

Hi Thanks for your clip. My Prius 2007 red triangle is on now . How can I diagnose that please ? I just want to know is it because of 12v battery or hybrid battery? Thanks.

I found if I hold display button for three seconds, it will exit the diagnostic mode; then can go to Audio, Climate… Thanks for video

What a bunch of crap! that shows nothing about the health of your hybrid battery, only the 12v one.

My catalyc comverter got stolen on my 2009 prius.. I drove like that for less than 2 miles and got red triangle with exclamation point on it. When that happened car started to loose power and eventually died on me:( right now I have it at a muffler shop where they will put another catalyc converter on but car still does not turn on..when I press on power button all the lights come on with rd d triangle like if car it's on but engine not on. Lights, radio and power windows work . The windows are slow though so I don't know if battery it's dying. If I remember I have one purple bar. Also keep getting a message about something that car needs to be on flat surface and something about the transmission . A while back it completely died on my while I was changing the passenger mirror, after I was done I gave it a jump and everything was good. This time it won't move from one purple bar even after a jumped it.

My dionastic move doest come on after I press 3 time.stay the same.anything I am missing.??2008 prius I have same .energy picture monitor doest show on my screen after toyota.my navigation come on.

Hi I'm noticing that my battery goes off sometimes because my clock and radio is different. I checked the battery like you posted and the battery has good numbers

Mines at 14 volts when on but my battery already went out in this heat it hits 13.9

Thanks for the video! Quick question, when the volt screen first shows up my 2011 hybrid Prius is at 11v resting but when I start the car it jumps to 13.9/14.4 does this need a new battery?

I want to add navigation map of Cambodia to my prius 2012 . Could u help me plz

Hi! Are you testing with the original battery or have you replaced that?

Hello, Would you please inform me that why `` PROBLEM`` shows on monitor while press the break on any traffic signal point and then its disappear again from monitor. "2006 prius.

I think when engine is running battery should b 14.6 otherwise fully charged battery should b 12.6 mean good battery

From my understanding every car (non hybrid) increases voltage when the vehicle is started by means of the altinator starting the 12v battery.

I’m looking to buy a used 2006 Prius that has 144,000 miles on it. What are some things I should check and keep and eye out for?

Actually, I got out of the internal diagnostic menu by holding the display play button down for 3 or so seconds and that returned it to normal screen.

Thanks.

Quick query: “To check the hybrid battery, turn the car on…” i’m confused here because I thought the car was already on and nowhere in that particular section does it say to turn it off. So how do we get from testing the 12 V to testing the hybrid? Your car appears to show the display illuminated whilst the car is off which I’m confused by. Someone clarify for me please?

i can't transfer my contact iphone to Prius . Please help

FYI - The test you show only verifies the 12v Aux battery, and the vehicle's alternator. The diagnostic screen shown does not provide any feedback regarding the traction battery which should be in the region of 346v (comprising of 96 Lithium cells in series of 3.6v each).

Sorry, but this is not a good test of the hybrid battery because the prius 12v battery is very small (Amp hour capacity) and it only takes a few amps to push a fully charged 12v battery up to its full charge of 13.8 volts. The hybrid battery in the prius has to send 100s of amps to the motor when needed for traction

I put in a deposit for $1000 at a dealership for a 2012 Toyota Prius. I am supposed to go pay the rest today September 15, 2022 or tomorrow. The car is being sold for $5500, the Carfax is clean but I’m just a little worried that it is over 220,000 miles. Can you advise me if that is a good buyer or not?

can you describe how to display dash lights that won't go on on my 2008 prius?