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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Auxiliary battery draining the hybrid battery

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 is making a knocking noise. 2006 Toyota Corolla

Hi - your engine could be knocking from bad fuel, ignition problems or bad bearings. Check your engine oil level first - a low oil level could be the most damaging. If the Check Engine light is illuminated, have the...

Q: Q: Vehicle won't start

Hello. This is not a problem with the alternator or the starter. I have yet to see a bad starter on this vehicle. It is almost always the battery. The battery will need to be load tested to verify this....

Q: Q: Ignition coil problem

Hello! I suggest having the vehicle inspected by another technician to get a second opinion. Usually when a Check Engine Light is on, the vehicle will have some type of issue. Rarely will a Check Engine Light illuminate when nothing...

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...
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...