Q: Alternator is dead!

asked by on

Battery light stayed on while driving. Shut off car and than could not star it again. Got it boosted and than car dies on me after 2 minutes drive. CAA guy tells me it's my alternator? Is this possible my car is a 2011! What causes this? Do I go rebuilt? How much could this cost me? Thank you in advance for your advice. Angelo

My car has 54000 miles.
My car has an automatic transmission.

This may be related to a failing alternator or voltage regulator. It is not at all uncommon for an alternator to fail. As you may 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. Often times this will result in the alternator allowing too much power to be delivered to the battery resulting in damaging wires and prematurely sometimes destroying the battery. In other cases it may result in the alternator not supplying enough power to the battery, resulting in undercharging the battery or not charging it at all.

In some cases when a battery is too weak or damaged, it may no longer hold a charge for any length of time, in which case the alternator may be doing its job, but the battery is just simply too weak to hold a charge. In either case, I would recommend having an expert from YourMechanic come to your location to diagnose your vehicle’s charging system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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. Alternator is dead!

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


When you kicked into passing (lower) gear, the engine was immediately heavily loaded. If there is any fault, or "weakness" in the ignition, fuel or air induction systems, such will become more readily apparent in those conditions. So, for example,...

Q: 2010 Honda Accord Crosstour - battery light is illuminated and there's a whining noise coming from the engine. Is this the alternator?

Hello. The battery light is usually activated when the computer detects that the system voltage is low. The most common cause for this is a faulty alternator or battery. The alternator is the component that provides the power for...

Q: Replace starter good battery new battery cables but not getting proper power to the starter

It sounds like what you are describing may be related to a faulty starter relay or some faulty wiring that may not be producing a proper connection to the starter. The starter relay directs power from the battery to the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.