Skip the auto shop - Our mechanics make house calls

Q: Warning lights are on and battery is low

asked by on

While I was driving on the the hwy in cruise control, the following lights came on: Check engine light is on, master warning light, VSC light, hybrid system warning light. Cruise stopped working. Was able to drive home. Now battery has only two bars on it. Master warning, check engine and hybrid light are still on and batter is down to two bars.

My car has 146000 miles.
My car has an automatic transmission.

It sounds like you very possibly have a failing HV (high voltage) battery, also known as the main hybrid battery. You may be lucky and be just under the limits for the battery warranty, as they were extended to 150,000 miles and 10 years from original vehicle in service date. You should have the warning light diagnosis verified first by a qualified technician, such as one from YourMechanic. This ensures that you go to the dealer with the knowledge you need to make sure your battery is replaced under warranty.

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
  1. Home
  2. Questions
  3. Warning lights are on and battery is low

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: Display panel not working properly

There have been issues where the second generation Toyota Prius displays have failed over time. The solder joints where the vehicle wiring harness connects to the display can vibrate and break over time, leading to connection issues and malfunctions. Sometimes...

Q: loud buzzing on driver side while in motion. no dash lights on?

Hello, thank you for writing in. There are several moving parts that can cause a vibration in regards to the air conditioning system. You or a technician will have to go through the components one by one until the vibration...

Q: My mechanic just replaced the transmission unit and the dashboard warning light come on and engine it doesn't start. can you please help me?

Hi there. Hybrid vehicles will not start the engine when moving in short light throttle distance. So, drive the vehicle for a distance and see if the engine will start. If the engine does not start up at all, then...

Related articles

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.