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Battery issue 2020 outback


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I've had this outback since mid December and am happy with the overall performance etc. In march during lockdown and the car hardly being driven the Battery went flat. No issue got Subaru assistance to come out and start me up and the offer of a new Battery .Great service and put it down to lack of driving .

I just took them up on the new Battery on the 9th and yesterday the 19th the Battery was dead again , Subaru assistance sent the local garage and got me restarted.I then did a bit of digging and found this is a problem in the US. Cars would have dead batteries for no apparent reason and new batteries fitted would die just the same. Is there a known problem with all the electronics draining the Battery when turned offf and is there a solution. I can't afford to have a vehicle that doesn't start. I've invested in a car Battery booster/starter but am !Removed! off I've had to do this with a new car with less than 4000 miles on it.

 

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13 hours ago, Dean Franklin said:

I've had this outback since mid December and am happy with the overall performance etc. In march during lockdown and the car hardly being driven the battery went flat. No issue got Subaru assistance to come out and start me up and the offer of a new battery .Great service and put it down to lack of driving .

I just took them up on the new battery on the 9th and yesterday the 19th the battery was dead again , Subaru assistance sent the local garage and got me restarted.I then did a bit of digging and found this is a problem in the US. Cars would have dead batteries for no apparent reason and new batteries fitted would die just the same. Is there a known problem with all the electronics draining the battery when turned offf and is there a solution. I can't afford to have a vehicle that doesn't start. I've invested in a car battery booster/starter but am !Removed! off I've had to do this with a new car with less than 4000 miles on it.

 

Try taking the Battery out and trickle charging it overnight. A lot of ‘new’ batteries don’t come fully charged, this can be the problem especially if your doing a lot of short trips 😉

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18 hours ago, Dean Franklin said:

I've had this outback since mid December and am happy with the overall performance etc. In march during lockdown and the car hardly being driven the battery went flat. No issue got Subaru assistance to come out and start me up and the offer of a new battery .Great service and put it down to lack of driving .

I just took them up on the new battery on the 9th and yesterday the 19th the battery was dead again , Subaru assistance sent the local garage and got me restarted.I then did a bit of digging and found this is a problem in the US. Cars would have dead batteries for no apparent reason and new batteries fitted would die just the same. Is there a known problem with all the electronics draining the battery when turned offf and is there a solution. I can't afford to have a vehicle that doesn't start. I've invested in a car battery booster/starter but am !Removed! off I've had to do this with a new car with less than 4000 miles on it.

 

I bought my registered September 27th 2019 XV a few weeks ago and on day 3 of ownership 98 miles from home had a flat Battery. After AA assistance drove home and Battery went flat overnight. Dealer replaced the 60ah factory Battery with  new Yuasa 65 ah Battery. Last week talking to the parts guy at Simpsons Swindon when buying some mudflaps he told me the factory fit batteries are rubbish and that the ones replaced under warranty should be Yuasa and they are far superior. 

Might be worth checking what Battery you have now. 

BTW the vin on my car shows it was Manufactured in 2018. 

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2019 Outback - When open, the rear hatch eats 4 amps continuously. Sub have a mod for this, although the daeler might need a bit of encouragement to apply it. Still draws 4A when open, but only for about 20min, then goes down to the normal low level.

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I'd also read about this being a problem with Subarus too.

I've just been car camping for a few nights and had the boot open for extended periods and the doors too. Fortunately no issues. Same on a previous trip away in June - boot open to provide shade.

I have been following the advice of the dealership I bought the car from, who (when I mentioned the Battery issue) told me to drive with the side-lights on, even on short trips.  Apparently, this forces the alternator to recharge the Battery. I've no idea if that's a load of codswallop (and I can't see why it wouldn't charge it anyway just like in all the other cars I've owned and never had to replace a Battery for years in), but so far I've no issues with a flat Battery (that'll jinx it!!).

Let us know how you get on, as with winter approaching, and the nights drawing in ( 🙂 ) I want ALL the electrics to work as and when needed.

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1 hour ago, Justin Time said:

I'd also read about this being a problem with Subarus too.

I've just been car camping for a few nights and had the boot open for extended periods and the doors too. Fortunately no issues. Same on a previous trip away in June - boot open to provide shade.

I have been following the advice of the dealership I bought the car from, who (when I mentioned the battery issue) told me to drive with the side-lights on, even on short trips.  Apparently, this forces the alternator to recharge the battery. I've no idea if that's a load of codswallop (and I can't see why it wouldn't charge it anyway just like in all the other cars I've owned and never had to replace a battery for years in), but so far I've no issues with a flat battery (that'll jinx it!!).

Let us know how you get on, as with winter approaching, and the nights drawing in ( 🙂 ) I want ALL the electrics to work as and when needed.

I should have added, I turned all of my internal lights off, and have left them off, weeks ago.   There's also an interesting thread currently on this issue here currently (no pun intended 🙂 ) subaruoutback.org

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I've taped the boot light in the off position as I've turned it on a couple of times taking stuff out of the boot. I've also purchased a NOCO potable jump starter Battery supposedly good for 20 jump starts so if the Battery dies I will be able to get it going wherever I am.

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6 hours ago, Dean Franklin said:

I've taped the boot light in the off position as I've turned it on a couple of times taking stuff out of the boot. I've also purchased a NOCO potable jump starter Battery supposedly good for 20 jump starts so if the Battery dies I will be able to get it going wherever I am.

I appreciate why you feel the need to do that.  No one likes to feel vulnerable and potentially stuck with a 'dead' car, especially if away from home.  But it's annoying to have to go to those lengths.  Is the car still under warranty?  It can't be right that a modern car has such a chronically persistent issue - if that's what it is.  Rather undermines Subaru's boasts of reliability if it can't be solved.  

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Here's the latest from the OB thread I mentioned before, which seems to summarise the issue/problem and also offer a solution.

 

"This issue has been discussed MANY times. Some of the comments in this thread have it correct.

This method of Battery charging is not unique to Subaru, but is used by several auto manufacturers. The reason - in order to squeeze a tiny bit more fuel efficiency, the alternator is shut off while running. Presumably, it is supposed to put enough charge back to the Battery by periodically cycling on during running. Unfortunately, the method is not that great and does lead to Battery undercharging. The result is shortened Battery life and occasional non-starting. While the OEM Battery is not the greatest, it is adequate for this size vehicle. Even with a high quality, high capacity replacement, the charging algorithm will eventually lead to any Battery running down.

As some have mentioned, turning on the parking lights will tell the ECM to bypass this mode, and run the alternator full-time. Yes it does. One can simply leave these on all the time, or even do a little modification to one of the wires leading to the ECM. The better solution is to have the dealer reprogram the ECM with a new update that eliminates this unnecessary/unwanted characteristic. After two Battery failures and replacements, I've had this done - for free (as it is their poor choice). Since then, my Outback Battery running voltage has been a steady 14.2 - 14.4 Volts (yes, on a calibrated voltmeter). It is definitely worth getting this done." (from subaruoutback.org )

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