12v battery dead
Hi, I have a 2022 Ioniq 5 and the 12v battery is dead. I can jump start it but 12v battery wont hold charge. I have been told to take in to dealership as battery under warranty but I dont have enough mileage. Can you charge nain batteries when 12v is dead? I have plugged in to my home 7kw charger but it just says waiting for ev. Also tried 13amp but doesnt charge so assume it needs some 12v power to kick in? Also can you lock car and shut charger flap manually or do I have to jump it again just to shut it?
You can still lock/unlock the car by removing the key from the fob and using the keyhole behind the handle on the driver's door. I believe there is a manual release for the charging port which is accessed from the boot.
My 12v battery went flat a few months ago, called AA and they charged it up for a few minutes - enough to start the vehicle up - and I immediately drove to a fast charger to get the main EV battery charged up (was down to 18%).
Some limited research indicates that once the EV battery falls below a certain level - around 20%-ish - then it stops topping up the 12v battery which eventually depletes. This then prevents the other electrics functioning, including the Start/Stop button, and renders it undriveable. The AA guy said it's a common issue with EVs and not to let the main EV battery remain on a low SoC for a prolonged period of time. Wasn't able to tell me whether it caused any permanent issues to the 12v battery but I've had zero issues since and always charge the car once I hit around 30%.
I have posted a YouTube link below to an Ioniq 5 owner who experienced this issue and provides a little more detail.
https://youtu.be/xAZEBg3XLs0?si=1Pt3ISgxmmnq-sbb
My 12v battery went flat a few months ago, called AA and they charged it up for a few minutes - enough to start the vehicle up - and I immediately drove to a fast charger to get the main EV battery charged up (was down to 18%).
Some limited research indicates that once the EV battery falls below a certain level - around 20%-ish - then it stops topping up the 12v battery which eventually depletes. This then prevents the other electrics functioning, including the Start/Stop button, and renders it undriveable. The AA guy said it's a common issue with EVs and not to let the main EV battery remain on a low SoC for a prolonged period of time. Wasn't able to tell me whether it caused any permanent issues to the 12v battery but I've had zero issues since and always charge the car once I hit around 30%.
I have posted a YouTube link below to an Ioniq 5 owner who experienced this issue and provides a little more detail.
https://youtu.be/xAZEBg3XLs0?si=1Pt3ISgxmmnq-sbb
My battery died last week. No power whatsoever.
Rang Hyundai and they said to bring the car in, but the car was immobilised. I have had the 12v battery recall fix applied at the last service and had nothing plugged in to the car while
locked.
Tried to charge with an AA charger but just got errors on the charger.
Called the AA and they came out to inspect. AA couldn’t charge the battery either and said it was dead and would need to be replaced.
I called Hyundai again and they said to ring the dealership to arrange for the AA to recover it to the dealership. The dealership said they couldn’t deal with it until the end of October(!!), at which point the battery would be out of warranty.
I explained that this left me no choice but to buy a new battery from AA at £160 and the dealership said don’t worry, Hyundai will test the old battery and refund the AA cost if dead.
I had the battery replaced by AA and car worked fine again.
Hyundai dealership rang back twice to move the date forward for inspection of the battery to the end of the week.
When tested, the deaership confirmed that the 2-year old battery was indeed dead. Car diagnostics showed no issues or reason for the dead battery.
On contacting Hyundai Customer Servicea to arrange a refund for the AA cost, they said I should have had the car towed instead. I explained that a) the dealership couldn’t accept it until October and b) the car was untowable because not enough space to get a low-loader truck to it and the car was facing a wall.
I am now at the mercy of the kindness and timescales of Hyundai’s “Good Will Team” who won’t even give you their contact details.
This is no way to treat a customer with a critical warranty issue who has been left out of pocket.
I saw on a US forum that in the USA they have recalled all 12v batteries for MY 2022 vehicles in my date range.
What to do?
Rang Hyundai and they said to bring the car in, but the car was immobilised. I have had the 12v battery recall fix applied at the last service and had nothing plugged in to the car while
locked.
Tried to charge with an AA charger but just got errors on the charger.
Called the AA and they came out to inspect. AA couldn’t charge the battery either and said it was dead and would need to be replaced.
I called Hyundai again and they said to ring the dealership to arrange for the AA to recover it to the dealership. The dealership said they couldn’t deal with it until the end of October(!!), at which point the battery would be out of warranty.
I explained that this left me no choice but to buy a new battery from AA at £160 and the dealership said don’t worry, Hyundai will test the old battery and refund the AA cost if dead.
I had the battery replaced by AA and car worked fine again.
Hyundai dealership rang back twice to move the date forward for inspection of the battery to the end of the week.
When tested, the deaership confirmed that the 2-year old battery was indeed dead. Car diagnostics showed no issues or reason for the dead battery.
On contacting Hyundai Customer Servicea to arrange a refund for the AA cost, they said I should have had the car towed instead. I explained that a) the dealership couldn’t accept it until October and b) the car was untowable because not enough space to get a low-loader truck to it and the car was facing a wall.
I am now at the mercy of the kindness and timescales of Hyundai’s “Good Will Team” who won’t even give you their contact details.
This is no way to treat a customer with a critical warranty issue who has been left out of pocket.
I saw on a US forum that in the USA they have recalled all 12v batteries for MY 2022 vehicles in my date range.
What to do?
I'm in Spain parked the car with 30% in battery. Walked round a village came back to the car 16% battery but WARNING 12V dead can't drive the car can't lock it etc etc. Called roadside assist (Saga) RAC 80mins later recovery came with booster pack got car going. My car was in for the battery recall, nothing found however here I am stuck in the middle of Spain with my family totally stressed again. Will it continue to fault because Hyundai haven't fixed the main battery to 12v interface THEY KNOW THERE'S AN ISSUE. IVE HAD SO MANY ISSUES WITH MY CAR THAT WHEN I GET BACK TO THE UK IM GOING TO HYUNDAI UK HEAD OFFICE AND DUMPING THE CAR REFUSE TO PAY THE PCP BALANCE THROWIBG THE KEYS INTO THEIR OFFICE END OF.
Range anxiety, range never as promised along with many many issues and the worst help from any car manufacturer. From receipt of the car, terrible pdi, safety issues. Dealership ( Cheshire Oaks Hyundai) absolutely clueless. This a £43k car lost 57% of value in 2 years now nearly 3 years so no residual value to buy an alternative car. By the way there was absolutely no accessories on in the car has anyone got a reason so that we can stop 12v issue ?
Range anxiety, range never as promised along with many many issues and the worst help from any car manufacturer. From receipt of the car, terrible pdi, safety issues. Dealership ( Cheshire Oaks Hyundai) absolutely clueless. This a £43k car lost 57% of value in 2 years now nearly 3 years so no residual value to buy an alternative car. By the way there was absolutely no accessories on in the car has anyone got a reason so that we can stop 12v issue ?
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