Skip the auto shop - Our mechanics make house calls

Q: Battery drained and car won't start

asked by on

When I forgot to turn off the inner light when I parked, the battery drained. I had to leave the car for 5 days due to having to go out-of-town. Upon returning, I carefully followed the instructions on how to jump-start my car. However, it didn’t work. I started by connecting the +ve terminal, then followed by the -ve. When the -ve was connected, my car kept honking on its own. The display monitor blinked randomly and looked totally haywire. Even so, I pressed the brake and pushed the start button, but the car didn’t start. Since I don’t know much about cars, I’m concerned that I’ll damage electronic components, especially the ic or the dc converters. Is the blinking normal and what can I do to fix this problem so my car will start?

I would recommend having your vehicle inspected by a technician who is qualified to service your hybrid vehicle electrical systems. If your vehicle’s 12 volt battery has failed, they should be able to replace it very easily for you and the vehicle should start again just fine.

If the hybrid motor battery has failed, this requires a professional to remove and replace it due to the extremely high voltage that is ran through this system. This hybrid motor battery can also be very costly, so professional diagnosis is key to determining what is wrong with the vehicle. This can avoid lots of potential wasted time and money due to a misdiagnosis. Hybrid electrical systems are nothing to take lightly and every safety precaution should be taken. If you would like help having your starting issue diagnosed and resolved, a technician from YourMechanic can come to your car’s location to service your vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Battery drained and car won't start

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: All lights on the trunk lid are out

The grounds for the fuel door and trunk items such as lighting and taillights share ground points G401 and G402. All of these wires are black in color. However, we would not suggest grounding or modifying vehicle wiring without access...

Q: Acts like the battery is low and when i try to start it, lights flicker and tries to turn over

It is very possible that your battery could be completely finished off. I would recommend disconnecting the sound system and installing a new battery in the vehicle to see how the vehicle performs. It is certainly possible that the sound...

Q: Horn starts blowing by itself

The most common cause of the horn going off all by itself is the horn buttons inside the steering wheel are shorting out and need to be replaced. They may be heat or cold sensitive when the problem happens/ It...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...