Toyota

Have Toyota Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

2012 Prius C: Start battery keeps draining over time.

Customer Question
2012 Prius C: Start...

2012 Prius C: Start battery keeps draining over time. Replaced battery with brand new Toyota OEM battery. Same problem. Lights, dome light, still come on just fine. Car will not start. Replaced battery in Key FOB.

Mechanic's Assistant: Have you checked the vehicle's manual for this?

Yes

Mechanic's Assistant: Are you fixing your Prius yourself? What have you tried so far?

Replaced battery. recharged battery with electronic recharger.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Sometimes, the car will start back up after it sits one or two days. When it did restart, we took to Toyota. They could not duplicated the problem. They said there was a faulty brake switch, which could be the source. We paid to have it replaced. We are still having the same problem, now

Submitted: 3 months ago.Category: Toyota
Show More
Show Less
Ask Your Own Toyota Question
Answered in 2 hours by:
3/28/2018
Toyota Mechanic: Shawn Few ,
 replied 3 months ago
Shawn Few
Category: Toyota
Satisfied Customers: 144
Experience: Lead Tech at F1 Auto Service
Verified

Hey how are you ,I will Try to Help you with This Issue

In some cases, I may need more info to assist better.I apologize for any delay.

I am here Sunday through Friday from around 5 am to 9 pm Eastern time.Zone If you respond and I do not respond back right away I will do so as soon as I can.

If you see a call request on your screen ,That is an automated feature the web site offers all customers.

there is drain on the 12 volt battery in rear trunk or hv battery ?

Toyota dealer found no faults in hv system or any other module ,did you pay for scan and report ?

did they run this below test

https://www.wikihow.com/Find-a-Parasitic-Battery-Drain

Are you looking for the most possible causes or you are repairing it yourself .

Please Let Me Know

Thank You

ASE Certified Technician

Ask Your Own Toyota Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a toyota mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Chris (aka-Moose) Your Own Question
Chris (aka-Moose)
Chris (aka-Moose)
Chris (aka-Moose), Auto Technician
Category: Toyota
Satisfied Customers: 1,107
1,107 Satisfied Customers
Experience: 16 years of experience

Chris (aka-Moose) is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU!

JugheadUSA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Chris (aka-Moose)

Chris (aka-Moose)

Auto Technician

1,107 satisfied customers

16 years of experience

Marty

Marty

ASE Certified Technician

197 satisfied customers

ASE & Bosch Master Tech. 30 years experience.

Amedee

Amedee

Toyota Technician

1,243 satisfied customers

ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector

Anthony

Anthony

ASE Certified Technician

401 satisfied customers

ASE Master Automobile Technician with over 20 years exp. in this field.

Richard

Richard

ASE Certified Technician

9 satisfied customers

Toyota tech. ASE Certified Technician

Skyvisions

Skyvisions

ASE Certified Technician

13,051 satisfied customers

Toyota Master Diagnostic

Genchi Genbutsu

Genchi Genbutsu

Toyota Master Technician

3,761 satisfied customers

Toyota Certified Master Diagnostic Technician, ASE Master Technician with L1 Advanced Engine

< Previous | Next >

Related Toyota Questions
My 1999 Toyota 4runner has something draining the batter. We
My 1999 Toyota 4runner has something draining the batter. We suspect radio/antennae. Since it was bought new, the antennae would automatically go up and down, cut the radio off and back on randomly. N… read more
ted ritter
ted ritter
Team Leader/toyota master tech/retired
High School or GED
2,692 satisfied customers
My 2012 Prius had the "Check Hybrid System" warning come
My 2012 Prius had the "Check Hybrid System" warning come onto the monitor; Then the dashboard proceeded to flash the check engine light and the yellow triangle. After that showed up my tires locked wh… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
My wife brought our prius home with various trouble lights
Hi My wife brought our prius home with various trouble lights on, !, the VSC light, the key fob light. I replaced the key fob battery, but now the power button has no action. I have a good dome light,… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
I tried to start the car yesterday and nothing happened
I tried to start the car yesterday and nothing happened other than the orange engine light came on and would not go off. The light on the starter button was green. I had started the car successfully 2… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,440 satisfied customers
I have a 2007 Prius. The Keyless entry system stopped
I have a 2007 Prius. The Keyless entry system stopped working after replacing the key in the FOB and removing & recharging the Aux Battery. … read more
Nissan mike
Nissan mike
23 satisfied customers
My 2012 Toyota Prius Five has a problem. The left dome light
My 2012 Toyota Prius Five has a problem. The left dome light does not go off and stays on. I've tried everything but the left light just stays on. what can I do? … read more
Your Toyota Guy
Your Toyota Guy
Toyota Technician/Team Leader MDT
589 satisfied customers
Toyota Prius: I have a 2012 Prius and it has never given me
I have a 2012 Prius and it has never given me any problems. I drive almost daily and have approx. 26000 miles on it. I left town for 3 days and when I came back and went to use the car it was making a… read more
ted ritter
ted ritter
Team Leader/toyota master tech/retired
High School or GED
2,692 satisfied customers
Prius II: I have a problem with a 2007 Prius: A few days ago,
I have a problem with a 2007 Prius: A few days ago, the smart key stopped working, as did the dome light and the clock in the dashboard. But the car war running okay - it seemed. I suspected, after so… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Toyota Prius: I have a 2007 Toyota Prius. 93000 miles. I
I have a 2007 Toyota Prius. 93000 miles. I replaced the 12V battery 4 months ago and the key fob battery 3 months ago. Yesterday drove to store, car was running fine. I came out of the store, tried to… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Prius: My daughter can't get the fob to open her 2009 Prius
My daughter can't get the fob to open her 2009 Prius nor would the little key open the door. The car still has its original battery. She tried the backup fob with the same result. I'm guessing the car… read more
ted ritter
ted ritter
Team Leader/toyota master tech/retired
High School or GED
2,692 satisfied customers
prius: My 2007 Toyota Prius' engine will not start. I put
My 2007 Toyota Prius' engine will not start. I put the key fob in and press the power button while pressing the brake pedal down and the dash lights up with every warning light and starts flashing, bu… read more
Genchi Genbutsu
Genchi Genbutsu
Toyota Master Technician
Vocational, Technical or Trade Scho
3,761 satisfied customers
Prius: 01 Prius keyless start no longer functions with either
01 Prius keyless start no longer functions with either fob. have to insert fob in fob slot on dash for car to start. This started (for both fobs) at the same time, this tells me it is not the fobs; al… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
Prius: My 2007 Prius would not open with the electronic key.
My 2007 Prius would not open with the electronic key. After using the mechanical key, pressing the Power switch would not start the car. Instead, all the warning lights lit up. The gas gauge bar and t… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
Toyota Prius: My 2011 Toyota Prius dies when I leave it parked
My 2011 Toyota Prius dies when I leave it parked more than a week without driving it. I took it to the dealer and they said they checked the battery and it checks out 100%. They think I am leaving the… read more
ted ritter
ted ritter
Team Leader/toyota master tech/retired
High School or GED
2,692 satisfied customers
Need help with 2007 Prius battery troubleshooting.
I have a 2007 Prius but sold to me as 2008 car! I have low mileage on it because I drive a Subaru and a Kia also. But when I am using my Prius, I always "trickle charge" my 12V battery under the hood.… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
13,051 satisfied customers
Toyota Prius Will Not Respond To Electronic Smart Key.
The Toyota Prius will not respond to my electronic smart key. I tried the regular key and was able to open the car and start it. After I started the car, I tested the smart key and it seemed to work. … read more
toyotek01
toyotek01
297 satisfied customers
1999 toyota camry: Had the battery checked and it was dead.
I have a 1999 toyota camry. Went to get in the car and the car would not start. Had the battery checked and it was dead. Replaced the old battery with a brand new battery, installed the new battery an… read more
AutoTech08
AutoTech08
Workshop owner
Vocational, Technical or Trade Scho
676 satisfied customers
2007 prius: Randy..I tried to jump it and it would not start.
Randy - I have a 2007 prius. I did not drive it for a few days and went to drive it and it was 100% dead. I tried to jump it and it would not start. I bought a new 12 volt battery and installed it. Th… read more
Toyotapro
Toyotapro
Technician
Vocational, Technical or Trade Scho
9,283 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x