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2013 Civic Si Sedan
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So my cars battery can’t keep a charge and it dies to 0% before I have to charge it again. Everyone told me to replace the alternator because the voltage regulator failed and I did that and then a couple days later my new alternator is testing as voltage regulator failed. I put in another brand new battery and then tested alternator and it still said voltage regulator failed. So it’s not the battery and I highly doubt that both my old and brand new alternator have bad voltage regulators so something is causing it. Any thoughts? This code 61-11 along with some other airbag codes(I reset and they haven’t came on because the airbags were replaced) and tpms codes were on.
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what brand alternator? denso is the recommended.

aside from you firing parts at the issue, its likely your battery sensor is the issue.
 
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