Possible Short?

I have 2017 civic sedan 1.5t and over the past three months my car has died randomly one time my girl did leave a light on but other than that all the other times the car just dies after i park it and go inside for about 20 minutes then its dead . I have aftermarket Hikari lights and was previously tunes but not since like september. I just want to see what you guys might think it is before i take it to the dealer. I think it may be my lights shorting it out but i don't think so. Thanks in advance

The car shouldn't die even if lights are left on; headlights are on a timer and the interior bulbs are miniscule.

There are 3 possibilities: 1 - your battery is defective, and isn't holding a charge properly; 2 - your alternator is shot and isn't charging your battery properly; 3 - you have a parasitic draw somewhere...but 20 minutes would mean it's a biig draw.

You can get a battery test done at a local auto shop or at your dealer; all in all it sounds like a warranty item.

edit: It's not dying WHILE driving is it? It doesn't start after you've parked? Also, it's not a 'short', it's a 'drain'.

Yep. Free battery test at any auto parts store will tell you battery/charging system.

So far as a parasitic draw, if you disconnect a battery cable and put an ammeter in series with the battery post and disconnected cable, you oughta see something. You can use this number vs the AH capacity of the battery to see how long it oughta last. It oughta be weeks/months if you calculate it out. Prior to doing any of this though... I'd take it in to the dealer if it's still under warranty (and we all still are).

If you have an instance in the past where you left something on where the battery drained flat... it isn't outside of the realm of reality, regardless of the battery's age, that the capacity has been drastically reduced from this hard [beyond] deep cycle. It's bad enough on a marine lead acid battery. The plates are so thin in a automotive battery, they just don't hold up well at all. Not sure what our battery's warranty is before it hit prorate... but 3 years is probably ballpark what it is for replacement w/o any money out of pocket.

Thanks guys , and i messaged my dealer and yet no call back .... of course lol. But I am gonna go to auto zone and test the battery and charging system. And no it doesn't die while driving thankfully. And I went to the corner store and was there for about twenty minutes came back out and car seemed like it wanted to crank but then eventually all my light just died on the dash it was like a 2-3 seconds then all dead. So i had to get a jump then went back to the house which is a minute away. Then I had to leave again within another 20 minutes or so then the battery died again so thats when i put the post up. So i just have to wait for a jump then head on down to the auto zone.

Sounds like a battery.

Just to save you some time, to do a proper check of the battery it must be fully charged...whatever that may be for your battery now. If you bring it in near dead, you'll have to wait around for them to charge it before they can call it 'dead for real'. If the capacity is shot, it'll charge quick, but have no capacity.

Just as a warning, you may sit around for a bit waiting for them to call it charged before they can load test it. To minimize this time, best if you go there after a decent drive or let your car idle for a while to let the alternator put a charge on it. Better yet... if you have a charger put it on there now and let it sit overnight.

Ok I borrowed a battery charger so I can charge it overnight and in the morning I'm going to head over to the dealer . Thank you

So took it to honda today and the battery was bad thankfully it was covered under warranty.

Yep. There's a lot of folks that have gone through a battery or two inside the prorate period. I think the batch of batteries Honda stuck in these cars from the factory weren't all that great.

Glad to hear you got it taken care of on their dime.