Q: Starter, alternator, or battery?

asked by on

Car died the other day mechanic said my cars alternator was running 12.5 volts instead of the 15 it is supposed to run but it should be fine for a while. I turned my car off later the night and it would not turn back on the next morning, my neighbor jumped it again and it stayed on but once again after turning off it wouldn't start Could it be that I killed my battery completely or is it my alternator.
My car's transmission is unknown to me.

Hi there. In most cases, when you’re pulling less than 15 volts from the alternator the issue is caused by an internal component failure within the alternator itself or the alternator relay. If the starter is not receiving the correct amps, it’s the battery that is at fault. With this type of situation, the best recommendation is to have a professional mechanic complete a no start inspection first. From there, they can determine if your VW issues are caused by the alternator, battery, or the starter. It may be a combination of two that need to be replaced - especially if the battery has not been replaced in the last few years.

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. Starter, alternator, or 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: my vw 04 beetle ticks when idling, the ticking goes away when you give it gas.

The problem sounds like you have low oil pressure and and engine knock due to engine rod bearing or crankshaft bearings are worn. You may also want to have front crankshaft pulley checked to see if it is bad before...

Q: Transaxle makes a loud grinding noise when you accelerate

Of course, first check the fluid level to be sure it is not low but if you are already hearing significant noise, there is probably mechanical damage that will have to be repaired. The problem has to be evaluated during...

Q: No start issue: crank but no spark- replaced ignition coil

The starter will not have any impact on the engine's ability to produce spark. There are a number of issues that may cause an ignition system to not produce spark. A bad crankshaft position (CKP) sensor (on engines that...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...