How To Know If My Car Battery Is Low. Your stomach sinks as you put in your key only to have your car not turn on. Signs of a Bad Alternator or Battery.

Listed below are a few of these symptoms that will alert you that its probably time to replace your fob battery. What the key fob battery low warning light means. The Check Engine light is a catch-all warning telling you something is wrong not necessarily something related to your battery.
Your batterys job is to start the car its your alternator that generates the power that keeps it running and recharges the battery.
The Check Engine light is a catch-all warning telling you something is wrong not necessarily something related to your battery. The water or electrolyte level in your flooded lead-acid battery reduces as you charge and discharge your car battery. Get below 0 and it gets even slower. A dead or low battery can be caused by a failing alternator.
