Skip the auto shop - Our mechanics make house calls

Q: Auxiliary battery draining the hybrid battery

asked by on

The battery level has been changing color from blue to purple/lavender. The dealer told me this is because the auxiliary battery was not properly installed. For the past 3 or 4 weeks after the installation, my car has been sounding like a racing car. He also told me that it was the auxiliary battery that had drained the hybrid battery. The dealer had initially reported to me that the auxiliary battery had been charged and reinstalled. However, this morning I had to go back to the dealership for the very same problem. The battery was again turning from blue to purple/lavender and it still sounded like a racing car when I would drive it. If they hadn't installed the auxiliary battery properly, would it be taking this long for me to notice the problem that I'm now having?

Auxiliary batteries can take awhile before symptoms may be noticed on a Prius. This is due to the hybrid system powering many of the components. In this vehicle the auxiliary battery is mainly used for starting. It could cause problems if not installed properly.

I’d recommend getting some help from qualified technician who will be able to diagnose the source of your battery issue and assist you with any repairs that may be necessary.

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

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: Car revved & lurched over curb while foot was on brake

Hello there, issues like this are very uncommon. When the vehicle does not stop like this it obviously makes the vehicle unsafe to drive and is a cause for concern. The most likely causes of this would be something obstructing...

Q: Starting in the morning

Cold weather can effect your car in a number of ways. To start, we need to know if the engine is cranking but not starting. If the engine is not cranking, or has a slow crank on cold mornings, your...

Q: Why do some cars have Direct Drive Gear?

Direct drive gear systems are used to transmit power to the wheels with an electric motor. They are used on hybrid/electric vehicles as a replacement for the transmission. Steering systems today use direct drive gear with the use of an...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...