Battery light sporadically flashing on for 1/2 second or less

Asked by psyprof2006 Mar 06, 2019 at 08:04 PM about the 2012 Hyundai Elantra

Question type: Maintenance & Repair

Had a check engine light on.  Took car in and was
told I needed new spark plugs and wiring.  Agreed
to all work.  I was told car was running fine.  Less
than two miles from shop, battery light started to
blink on and off very sporadically and never came
all the way on.  It would briefly flash once and then
flash again a minute or two later.  Took it back to
garage.  They checked battery, alternator, and all
connections.  They said everything was fine.  I
drove it home.  The light is still flashing, just less
often.  Unsure of what to do now.

7 Answers


My car is doing the same but when it flickers it shakes sometimes. Everyone says my battery and alternator test come up fine so they're unsure of the problem. I have the same make, model and year of your car.

1 people found this helpful.

Any Answers? We're having the same problem


did you guys take notice if your car does this when it is cold or only when it is warmed up? I'm having similar issue and am beginning the diagnosing process tomorrow however my car only seems to do it once the car is up to temperature.

Mechanicforfun, I am having the same issue as well. Sputtering and light flickering only when warmed up. Frequency and impact of shutter seem to increase as the car warms up to full temperature(~20mins). Did y’all have any luck diagnosing the issue? So far, I have: Tested battery and battery connections-no issue detected.(~12v w/ car off) Tested alternator(idling in park)- providing appropriate voltage. (~14.5v w/ car idling) Changed spark plugs Added fuel line cleaner(haven’t driven it much as I’m still trying to diagnose issue so not sure if this has any bearing here.)

Has anyone found an answer? Same car & hes been doing it for months & can't find an answer. Please let me know! Thanks!

Just pinging this again in case anyone was able to solve this issue yet?

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