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Model specific boards => Golf mk7 => Topic started by: Gulfstream11 on 20 October 2021, 11:35

Title: Low Battery Car dead!
Post by: Gulfstream11 on 20 October 2021, 11:35

Morning.

Got in the car this morning, would'nt start. Just a click. Low Battery warning flashed on the screen. I left it a while, tried again and again eventually it started to turn over. 4th attempt it started. I'm guessing a new battery is needed. My question is, when its changed is there anything that needs to be reset. I ask because when I got it going all sorts of warnings came up. No ACC, Stop start deactivated, cornering lights not working and a few others I can't remember. I'm worried this will not be a swap for new and also concerened it will negate my Revo Stage 1. Can anybody put my mind to rest before the deed is done.

Cheers

Title: Re: Low Battery Car dead!
Post by: Finglonga on 20 October 2021, 12:42

The new battery will need coding, best get a AGM battery to replace the EFB as they have better cranking power and can handle deep cycling.

When you put the new battery on the dash will light up like a Christmas tree but they will go out after a short drive.

I have the battery below and it has been fantastic.

https://www.batterycharged.co.uk/shop/brands/duracell-automotive/duracell-extreme-battery-range/duracell-096-de70-agm-extreme-1241112.html

Title: Re: Low Battery Car dead!
Post by: Gulfstream11 on 20 October 2021, 13:09

Thank you. Just had my lunch in the car. It laboured on start up but cranked ok. I'll give my garage a ring to order the battery.

Title: Re: Low Battery Car dead!
Post by: Finglonga on 20 October 2021, 15:11

Just be prepared for it not to start suddenly and keep a jump starter handy as when mine went it only gave a days warning then absolutely nothing. :sad:

Title: Re: Low Battery Car dead!
Post by: topher on 22 October 2021, 22:36

Quote from: Gulfstream11 on 20 October 2021, 11:35

also concerened it will negate my Revo Stage 1.

that doesn't happen with the mk7 ECUs, only older MED9 as found in Mk5 GTI etc.

Title: Re: Low Battery Car dead!
Post by: willni on 23 October 2021, 08:50

Quote from: Finglonga on 20 October 2021, 15:11

Just be prepared for it not to start suddenly and keep a jump starter handy as when mine went it only gave a days warning then absolutely nothing. :sad:

I've a wee jump pack similar to this one (https://i.postimg.cc/Ssd2PKgT/Screenshot-2021-10-23-at-08-46-01.png) (https://postimages.org/) it's brilliant, I had to use it last night as my mk5 battery is dead as well despite being on a trickle charger. I've used it on lots of things up to a 4L V8 diesel and a 4L V8 petrol, much handier than jump leads.

https://www.halfords.com/motoring/battery-maintenance/jump-starters/gb40-1000a-noco-jump-starter-721898.html?cm_mmc=Google+PLA-_-Motoring%3EBattery+Maintenance%3EJump+Starters-_-Motoring%3EBattery+Maintenance%3EJump+Starters-_-721898&istCompanyId=b8708c57-7a02-4cf6-b2c0-dc36b54a327e&istFeedId=62b447cf-331e-4fec-a47a-9985ff72d404&istItemId=wrpxpiawq&istBid=t&_$ja=tsid:|cid:13230549599|agid:129538708744|tid:pla-329023466328|crid:523555172092|nw:u|rnd:15058221895568230635|dvc:c|adp:|mt:|loc:9045197&gclid=CjwKCAjw5c6LBhBdEiwAP9ejG3tXbdpAAPCxbD9Y6euXrwy-G13eyVVjy1J5pZlEACmrzwTCbqdMmxoCR-gQAvD_BwE

Title: Re: Low Battery Car dead!
Post by: Guzzle on 23 October 2021, 10:21

A mate of mine let me borrow his Halfords jump pack when my GTD battery was on its way out.

Brilliant bit of kit, saved me anyway. Think he said it was about £80. He uses it on his classic cars so definitely had his moneys worth.

Title: Re: Low Battery Car dead!
Post by: Gulfstream11 on 25 October 2021, 10:09

In the end it was a new battery. I thought it might have been AGM as suggested but according to the specialist it should be an EFB and that is now fitted. Spent a while coding it before pick up. Just one error remains, corner light not working. Well it is. I've checked when dark. Can I fix this error using OBD11.?

Title: Re: Low Battery Car dead!
Post by: Finglonga on 25 October 2021, 10:58

EFB is standard OEM fitment, AGM is the upgraded one that are superior in cold cranking power.

Title: Re: Low Battery Car dead!
Post by: Lordie on 26 October 2021, 20:57

As said above, I think you should've swapped to the AGM for a little upgrade