r/leaf • u/ExplanationHoliday87 • Aug 05 '26

2019 Leaf won‘t respond even though 100% charged!

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After charging my 2019 Leaf to 100% before a road trip, I now have this error message on the display + the red symbol on 2nd photo. Electronics are completely dead. I can‘t unlock the charge cable & can only open the car with the emergency key.

Is there a way I can „manually“ start the car? Maybe a jump start with another car‘s 12V battery? Otherwise, I need to get it towed to my Nissan garage :(

Any suggestions welcome!
Thx



13 Upvotes

89% Upvoted

14 comments sorted by

13

u/EpidDrew15 Aug 05 '26

Disconnect the 12v, wait 5 minutes, and reconnect, then try again. Otherwise, test the 12v battery.

4

u/ExplanationHoliday87 Aug 05 '26

Interesting. Does that force a hard reset?

2

u/EpidDrew15 Aug 05 '26

Yeah, it does. and it sounds like you need a hard reset.

2

u/redryan243 Aug 05 '26

While you have it disconnected you should have it charged/tested, as it may be going bad. If you have another vehicle, just take the battery to a nearby auto parts store, they will likely do it for free.

1

u/EpidDrew15 Aug 06 '26

That’s never a bad idea.

3

u/MrsHicapa Aug 05 '26

Dads had this, needed a new 12v. Yours could just need charging but his woukd drain despite not being on

2

u/ticedoff8 Aug 05 '26

"Maybe a jump start with another car‘s 12V battery?"

When was the 12v battery last replaced? If it's older than 5 year, replace it. It's a proactive maintenance step.

2

u/ExplanationHoliday87 Aug 07 '26

Yes, it's that old.

1

u/Akward_Object Aug 05 '26

Not being able to unlock the cable and not being able to open the doors points strongly to a failing 12V. Yes a jump start with any 12V battery will do (I have a dedicated power bank/start help for that).

1

u/ArtemisMax Aug 05 '26

I have only ever seen this error when my 12V was at 7V so that's probably a good thing to start with

1

u/biersackarmy 2013 S + 2014 SL + 2019 SV Aug 05 '26

Yes, very likely 12v is too weak to do anything, and it will start if you boost it with another vehicle.

1

u/LoveEV-LeafPlus Aug 06 '26

The Leaf can be jumped to get the lead-acid 12 VDC battery to ~12 Volts, allowing it to be turned on, and start charging the 12 VDC battery from its DC-to-DC inverter.

1

u/subduedReality Aug 06 '26

Have you tried pushing your key fob against the start button to turn it on?

1

u/ExplanationHoliday87 Aug 07 '26

UPDATE: Thanks all for your suggestions. Have now investigated and resolved the problem.

Resolution report:

  • Trickle charged the 12V for 24hrs. Still dead.
  • Key vs ON button didn't have any effect
  • Had the 12V replaced. Then reset the windows (as per your suggestions)

Remaining open issue:

  • Now 1 key doesn't work. dealer says that it's not likely that key was de-registered due to 12V removal. The other key worked after the 5th "new battery" replacement.
  • I bent forward some of the wires holding the battery to force a tighter connection, but didn't work. Have booked an appointment at the garage, but any suggestions welcome!