2016 Jeep Grand Cherokee battery voltage moves between 13 & 14.6 at idle

Asked by Sep 21, 2019 at 04:29 PM about the 2016 Jeep Grand Cherokee Limited

Question type: Maintenance & Repair

Hey guys, I recently got my car back from a regular service, oil and fluids etc.
and I noticed that at idle, like at stops lights, that the battery voltage drops
from 14.6 down to 13, a couple of times just below 13. It makes the vehicle
rock quite a bit and the headlights dim. This has also caused the engine light
to come on. Is this my battery or the alternator? While driving it maintains
14.6. I have no Starting issues so it doesn’t seem that the battery is dying.

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