Q: Why do I have to jump start my car?

asked by on

My 2015 chevy suburban does not start with out being jum started, I got the battery checked and it's good battery, do you know why this is happening

My car has 51234 miles.
My car has an automatic transmission.

This is generally a sign of a weak battery or a failing alternator. If the car starts without any problem when being jumped, this is generally a sign of a lack of power from the battery which means either the battery itself is dead or the battery is good and the alternator is failing to charge it properly. 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?
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. Why do I have to jump start my car?

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: how much would it cost to replace battery in 2007 BMW 525i?

The average quoted at this page is $212 but if you input your specific location you will get a more precise quote and scheduling options for the mechanic to perform the replacement at your location, at your convenience. Please let...

Q: Slight miss in truck

The most common cause of a misfire on the engine is dirty fuel injectors. It may be a good idea to have the injectors cleaned. One common issue I have seen also is a failure in the variable valve timing....

Q: Q: Car starts, but dies.

I think you probably have a bad alternator. If you car starts, it's not the ECU. It could be the mass air flow sensor(MAF) but that has already been eliminated. You could have a clogged fuel filter which means it's...

Related articles

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 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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...