I am hearing similar issues across EV brands of date.
We are currently contemplating shifting our household on-road vehicle
fleet as life is changing how we travel. This past week, our 2017
Nissan Leaf stranded us as it would not allow shifting into drive or
reverse when we started it up to continue on our errands run for the
day. The messages on the dash were unhelpful (some irrelevant, some
clearly not recognizing the situation on the ground). Short version
after tow and dealer running diagnostics (which confused them, too), was
that the most likely common denominator failure was the 12-volt
auxiliary battery failed. They tried jumping the battery, and that did
not work. (It worked for us the night before at the end of the tow so we
could get the driver door window up.) They called me with that, and
suggested we try replacing that battery (which I had suggested in the
note I left with the fob at the overnight drop-off). I said do it. We
got a bill for a spendy battery, a full vehicle diagnostic and some shop
time, but got the car back the same day, and it's put in 2.5 days of
reliable service again since then (and will be out again today).
My SO's reaction was it's time to sell this thing and get something new.
My response was this was a 9-year-old car, and this was the original
auxiliary battery (so it had done it's time and more) and the first real
service item on the car since we bought it (tires, wiper blades and
cabin filters have been consumed, and brake pads have been replaced
(front at 85,000 km, rear at 100,000 km). Basically, we just keep
plugging it in and it keeps working. The diagnostic showed the traction
battery is degrading slower than the expected trend line. I think it's
the keeper of the fleet (our son's 2014 Ford Focus Electric and a 2021
gasser). The bill for the work on Tuesday is the equivalent of 14
fill-ups (which are really about 2/3s of a tank due to out-of-gas
paranoia) on the gasser, which is roughly every 3 weeks because the Leaf
is the go-to vehicle for our regular trips, and the gasser rolls for
trips beyond 100 km or when we all have separate destinations for the day.
So, not only is my desire to keep the Leaf going longer (it's been
reliable and cheap to own and operate) because it doesn't use fossil
fuel, but also because the newest EVs and PHEVs seem to have a spotty
reliability record and go out of service a fair bit. Our neighbour's
2-year old Ioniq 5 was out of service for 2 months for a wiring issue,
then written off when they discovered the basic fault was rodent
(squirrels or field mice likely) damage on the main controls wiring
harness, and it wasn't worth the vehicle dismantling and reassembly to
replace all that wiring harness.
YMMV
On 2026-07-31 10:52 a.m., an Ioniq 5 owner(via
[email protected])wrote:
Subject: [EVDL] Ioniq 5 Charging Woes
To:[email protected]
Message-ID:
<CAFun=YJk+C+U7F=BnYvrUD969=_gckL_avZvUmtc=6-bBk=j...@mail.gmail.com>
Content-Type: multipart/alternative;
boundary="00000000000012d9630657e7a7f9"
Like many owners of a Hyundai Ioniq 5, I experienced an ICCU module
failure. I waited two months for a replacement. I thought that was the
end of it...
but wait, there's more!
The car worked fine for three months, but then the same symptoms started
again! Plug in the charge cord and the car announces, "Charging started,"
followed a few seconds later by "Charging failed."
The root cause this time was different.
*P0D9B11* — Battery Charger Coupler Temperature Sensor "A" Signal Low /
Short
*P1BAD92* — Charger Coupler Temperature Too High
The remedy is simple: replace the charge port and wiring harness
It took the dealer a couple of days to diagnose the problem, a few days to
wait for the part, and a few more days to repair the cars ahead of mine in
the queue. So, in week 30 of 2026, the car is back on the road. For 10 of
these 30 weeks, the car has been out of service.
We are not amused.
--
Darryl McMahon
Independent Project Manager (sustainable systems)
“Your beliefs become your thoughts,
Your thoughts become your words,
Your words become your actions,
Your actions become your habits,
Your habits become your values,
Your values become your destiny.” ~ Mahatma Gandhi
If your beliefs are shaped by for-profit social media,
who bought them, and why?
--
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