Ioniq 5 broken.

[Joeboy]

That's pretty crap service - and not great the battery failing after only 2.5 years

Lots of lead/acid batteries fail soon after the warranty expires. Nothing new there. Modern battery chemistry is not kind for situations where the battery is not kept fully charged at all times. Every discharge and recharge cyle adds up.

The factory 12V batteries on the I-5 are a well known weak link. Mine is coming up to two years old. I’ve never used the blue link app but often used to play the radio while parked - often until the car warned of auto shut-down.

Blue link has created a problem for some, at times, where the system keeps getting activated unnecessarily, multiple times. Leaving the car at below 20% state of charge, for the traction battery, was another reason for a flat battery (they now apparently recharge the 12V battery until 10% SOC). Dash cams, which don’t completely shut down, are just one more possibility for a parasitic load with the car off.

Mine was like one of these. Plenty of options with a search on epay for 12V battery monitor. I bought four at the time - one for each car battery and two for monitoring the batteries which run my chinese diesel heaters.
https://www.ebay.co.uk/itm/315693335365 ... R6L4_dSzZA

If the battery proves to be dead and is the only reason for the fault, I would be changing it soonest.

Thanks, for the link. My own take on 12V car batteries is looking for about 5 Winters out of one, as they say 'Mileage may vary'

Interestingly (i hope), when I went in this morning and said about the permanent 4A draw and 5A charge rate from main pack to 12V the very nice service lassie went and got the dealership EV guy. I had jokingly said to the lassie " cars been fine for 2.5 years, had an ICCU recall last month, related?" Ha ha ho ho etc.

The EV guys comes through and I describe what is happening, straight away he says "oh yeah it'll be the ICCU recall"

Me Eh? Aye, the one that was updated last month?
Him Yeah, the latest ICCU recall has caused a drain fault on the 12V.
Me No way! Ah man, that's brilliant PMSL!!
Him Yeah we already had one in and Hyundai told the owner to take it away and drive it as they have not got a solution yet for the mistake made in the ICCU update.
Me Cheers mate, thanks very much for your time and I shook his hand.

I then spoke to the nice lassie and said any chance of the car being bumped up the diagnostics Q?

Initially it was going to be up to a fortnight wait. Once diagnosed and shown to be faulty the dealership can authorise a courtesy car for us but not before.

SWMBO driving me home and a message in saying "work on your vehicle has started". So that's good, big box of chocs for the lassies there regardless of outcome.

I'm not saying all ICCU recalls will result in this as we put different loads on the 12V, some will have been replaced and we run them in different ways . Thinking of the uptime on the EV when its charging from the drive pack to the 12V. Slow degradation of the stored 12V power until it just falls over.

I will update when i hear more but glad i've ordered a jump pack for going forward.

[Joeboy]

Cars sending distress messages about being on for more than 30 minutes and it's doors & bonnet being open!

[richbee]

That's pretty crap service - and not great the battery failing after only 2.5 years

Lots of lead/acid batteries fail soon after the warranty expires. Nothing new there. Modern battery chemistry is not kind for situations where the battery is not kept fully charged at all times. Every discharge and recharge cyle adds up.

The factory 12V batteries on the I-5 are a well known weak link. Mine is coming up to two years old. I’ve never used the blue link app but often used to play the radio while parked - often until the car warned of auto shut-down.

Blue link has created a problem for some, at times, where the system keeps getting activated unnecessarily, multiple times. Leaving the car at below 20% state of charge, for the traction battery, was another reason for a flat battery (they now apparently recharge the 12V battery until 10% SOC). Dash cams, which don’t completely shut down, are just one more possibility for a parasitic load with the car off.

Mine was like one of these. Plenty of options with a search on epay for 12V battery monitor. I bought four at the time - one for each car battery and two for monitoring the batteries which run my chinese diesel heaters.
https://www.ebay.co.uk/itm/315693335365 ... R6L4_dSzZA

If the battery proves to be dead and is the only reason for the fault, I would be changing it soonest.

You're right, it is common for normal vehicle batteries to fail relatively soon, especially if not used frequently, or for lots of stop-start journeys.
My Transit model is known for being pretty crap with battery life, partly because of having a smart alternator, so it never gets fully charged.
What I can't understand is how, when you've got a dirty great 70kWh -ish lithium battery pack sitting right next to the diddy 12V battery, why it can't continuously trickle charge it and condition it - can't be that difficult?
My van is now 7 years old, and still on the original vehicle battery, but that is because I've got a solar panel on the roof, with B2B charger which trickle charges the main battery once the leisure battery is full - it seems such a no-brainer to have that kind of technology

[nowty]

My TM3 had its first MOT this morning, has it really been that long. , passed no problem.

I just had a look to see what low voltage battery mine has because they changed over from lead acid to lithium around the time I bought mine.
Its lead acid.

I found the battery in all of my previous ICE cars failed around the 5 year mark.

[dan_b]

My first TM3 had a LA 12V battery. That'll be coming up for 5 years old now I reckon.
My current TM3 has the Li-Ion "12V" (it's more like 15 or 16V) - it's remarkable how small it is compared to the old LA ones. It also says "not for use for jumpstarting" on it (or language to that effect)

[Moxi]

Over the life of the vehicle I wonder what the weight saving between LA and Lith is in extra miles ?

Moxi

[Joeboy]

Dealership got back to me. Diagnostics has shown a bad cell in the 12V, I've ok'd them to fit a new one as car is out of warranty for the 12V battery. They'll charge fully the new one fit and retest diagnostics.

Apparently 12V is only covered with 2Yr warranty from new. My one is 2.5 yrs old....

I don't particularly fancy paying the heinous amount for a dealer fitted battery but I also don't want to give them any wiggle room down the road. On the upside they have been very quick to get into the diagnostics on the car.

5yr warranty yes but not accessories...

[Moxi]

you could argue the ICCU being faulty for those two years killed the battery - worth a bit of free labour if you paid for the battery ??

Moxi

[Joeboy]

you could argue the ICCU being faulty for those two years killed the battery - worth a bit of free labour if you paid for the battery ??

Moxi

That thought has run already..

[Joeboy]

My TM3 had its first MOT this morning, has it really been that long. , passed no problem.

I just had a look to see what low voltage battery mine has because they changed over from lead acid to lithium around the time I bought mine.
Its lead acid.

I found the battery in all of my previous ICE cars failed around the 5 year mark.

Congrats BTW, always nice to get out the other side of that unscathed. This battery is the first money I've spent on the car. On my search for truth it turns out that US I5 cars have a 3yr warranty on 'everything'.