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If the battery warning light is illuminated on a 2009 Corolla, what could be the issue?
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★ Top Answer
If the battery light illuminates in your 2009 Toyota Corolla, it indicates a potential issue with the car's electrical system, possibly stemming from the battery or alternator. Start by checking the battery voltage after it has been idle for a few hours; it should read above 12 volts. A reading below 12 volts could signify a faulty battery cell requiring replacement. Next, verify that the alternator is charging your car's electrical system at 14.4 volts; any lower may necessitate inspecting the alternator and its voltage regulator.
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When I start my car, the light is on but it goes off after I've been driving for a while. I think the charging system is working properly. I'm guessing there might be a faulty cell in the battery.
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The battery indicator in a 2009 Toyota Camry illuminates if there is an issue with the battery charging system. If it remains lit while you're driving, it likely means there is an issue with the belt that powers the alternator.
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