Q: After jump start why is check engine light on?

asked by on February 18, 2018

Car wouldn't turn over after I was using the battery to use my phone for awhile. Although battery wasn't dead at all I jump started it and it started . The check engine light is on now , should I be worried? Why is the check engine light on?

My car has 94000 miles.
My car has an automatic transmission.

When the battery light comes on, this may indicate you may have a faulty alternator or a weak battery as a result of the alternator not properly charging the battery. I would suggest having a professional from YourMechanic come to your location to perform a series of tests on your vehicle’s charging system to determine the proper repairs needed.

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

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

Check engine flashing and loss of power - 2009 Chevy Equinox

Hello. A flashing Check Engine Light is a warning that an urgent issue has occurred. A flashing Check Engine Light signifies that the computer has detected a failure that may potentially cause damage to the vehicle's emission system. Continuing to...

Check engine light and traction control light came on at same time.

Hi, thanks for writing in. A diagnostics has to be run on the vehicle to determine why the lights are on. They are most likely related but the only way to be certain as to what the cause is, is...

What is the difference between a tensioner and tensioner pulley?

Hi, thanks for your question. For your 2009 Honda Odyssey, the tensioner and tensioner pulley are one unit. They make up what is called the tensioner assembly. This tensioner assembly has two pulleys located on it and they can be...

Related articles

The 5 Safest Used Cars You Can Buy For Under $20,000
The Subaru Legacy, Honda Accord, Ford Fusion, Chevy Volt, and the Volvo XC60 are five of the overall safest used cars you can buy for under $20,000.
The Best Used Cars to Buy If You're a Rock Climber
If If you’re a rock climber, you want a vehicle that gets you where you need to go, even if the terrain gets rough. You may be living out of your vehicle at times, so you also want a rig...
2012 Subaru Outback vs. 2012 Chevrolet Impala: Which One Should I Buy?
When you compare a 4-door sedan versus a 4-door wagon, there are going to be some obvious differences. Even though the Outback looks car-like, the ride, the handling, and the mileage are going to make it more similar to an...