Q: Red Battery indicator comes on. Car cuts off on the highway.

asked by on December 30, 2016

Red Battery indicator light comes on, then the car cuts off on the highway until i come to a stop on the side of the hwy. AAA tried to jump it and the driver's window rolled up some, then stopped. AAA tow truck driver said his electric car jumper registered that the battery was at 0%. Don't want to pay for an alternator that I don't have too. Please help?

My car has 64100 miles.
My car has an automatic transmission.

Alternator Replacement $149.30 - $1391.75 Get a Quote

Hello There, It sounds like you may have a failing alternator or voltage regulator. As you know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator. The voltage regulator is a unit that regulates the charging of the battery by the alternator and maintaining a certain amperage while the engine runs. When the alternator is not working properly, this may result in the battery quickly losing charge and the car losing all power as you have described. You may also notice a whining sound as a result of the bearings inside the alternator begin to fail. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your charging system.

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

What others are asking

Truck shakes violently while braking

This may be a sign of worn out or failing wheel bearings. When this happens, this can cause a vibration usually opposite the defective side. When this happens, commonly this is a result of metal on metal contact inside the...

Fuel System?

A whirring noise is actually a common symptom of a failing fuel pump. You can rule the power steering pump in or out just by disconnecting power steering belt. Obviously, if the noise remains the same with pump disconnected, then...

So I bought my wife a 2016 malabu and out of no where the battery saver light came could it be the same as the cruz

Hello, thanks for writing in. Both the battery and the alternator may be at fault. The light turns on any time low voltage is detected. That being said, both are easy enough to test. Most automotive parts stores will test...

The car cannot start right away when the engine's cold

It sounds like you are on the right track with thinking it's a fuel-related issue with your 2000 Audi A8 Quattro. Your Audi may not be getting enough fuel for a cold start due to incorrect sensor data. Or it...

Audi stuck in first gear.

Your transmission needs a vehicle speed sensor signal in order for it to shift. A bad sensor may be the cause of your problem and would need to be properly diagnosed by a qualified mechanic to scan for codes in...

Doors wont lock or unlock with fob or switch?

Hello. Further testing should be done to help solve your problem. Being that the door unlock reprogramming procedure has already been done and the fuses have been checked there's not much left it could be. When you hit the unlock...

My air doesn't work all the time

Hello, thank you for writing in. There are a few more bits of information that we need to try and help guide you. If by not having air, you mean that the air stops blowing, then you have an issue...

VSA light, brake and ABS light is on. Had breaks checks and they are good. Why are those lights staying on?

This is caused by one or more wheel speed sensors are getting a bad signal to computer and will need to be replaced. I recommend getting the ABS system scanned for stored codes that will tell you which wheel sensor...

Engine swap project, fuel pump relay wont engage from the ECU.

Hi there. Check the wiring from the fuel pump relay to the computer and see if there is a break in the wire. If there is no break in the wire, then check the power to the pin where the...

Related articles

A Buyer’s Guide to the 2012 Audi Q7
When When only the most exacting performance will do, but you want an SUV that delivers third row seating and is comfortable enough for family trips, the 2012 Audi Q7 should be on your list. Key Features While it is...
A Buyer’s Guide to the 2012 Audi Q7 TDI
If If you’re looking for a luxury crossover that has all the high-end amenities and plenty of power and fuel economy, you’ve found it in the 2012 Audi Q7 TDI. Fans of the Q7 will immediately recognize the overall look...
A Buyer’s Guide to the 2012 Audi TT
Audi Audi can be depended upon to bring the ultimate in refinement to the table, along with quality, style, and performance. The TT is no exception to this rule – with its aerodynamic almost Porsche-like look and 360 turbocharged horses...