Nissan Leaf Won’t Charge -Top Reasons Explained


Owning an EV is a great life choice. The Nissan Leaf has been on the market since 2010. But if your Leaf won’t charge, then it’s suddenly not a great life choice. There’s always a reason your car won’t charge and always a solution.

Common reasons your Nissan Leaf won’t charge include:

  • No power going to your Leaf
  • Charging timer on
  • Cable problems
  • Battery too hot
  • 12V battery dead

In this article, we’ll look at why your Leaf won’t charge and how to fix it.

Nissan-Leaf-on-charge

No Power Going to Your Leaf

The most common cause for your Leaf not to charge is there is no power going to the charge port. There are a few reasons why no power is available.

  • Power outage
  • Overloaded circuit
  • Scheduled shutdown

Power Outage

Power outages have become more and more frequent in our everyday lives due to storms and weather conditions due to climate change. Unlike an ICE car, if you are the owner of an EV, it becomes second nature to check the weather. If we have no power, then we can’t charge our car, which could result in working from home for the day, (or worse!) having to take public transport!

Preparation is key. If we know a storm is brewing, we can precharge our car or have at least enough range to travel to a fast charger. Fast chargers are generally installed with backup power, such as solar.

Or we can have a generator on standby, which, to be honest, kind of goes against the EV ethos but sometimes needs must.

First things first, check if you have any power. You may not have noticed that the power is down and gone straight to your car. My go-to item to check power is my electric stove. Most stoves have a digital clock on them. If the power has been off, then the reading will be a couple of hours behind and usually flashing. If the power is still off, then there won’t be any reading available.

The power might be restored, but that doesn’t mean your car has charged. Most people charge their Leaf at a particular time each day, usually at night. If you have had a power outage, then your timer won’t have kicked in, and your car hasn’t charged.

You can do an immediate charge start now, but it’s going to take a couple of hours to get you to the level you require. As I say, if you have enough range, going to a fast charger is the optimum choice after a power outage.

Overloaded Circuit

The circuit that your charger is on may have become overloaded at some point through the night, and your car hasn’t charged because the circuit has tripped.

Why would a circuit overload? For a couple of reasons. Each area of your house is zoned. Your EV takes a lot of power to charge, especially if you have a Level 2 installed. Somebody has plugged in another heavy energy item in that some, and the circuit has tripped. This is, of course, a good thing. Circuits trip to prevent fire. But not good if you thought that your car was happily charging through the night only to discover that it hasn’t.

Have a look in the charging area and see if there is anything unusual plugged in a power washer or anything with a heating element. If there is, unplug it and then go and check your circuit board. Flick the circuit switch, and hopefully, everything is back working correctly again.

If it trips again, there’s an issue with that zone, which could be your charger or the charging cable.

Unless you are a qualified electrician, you need to call one out to check over your EV setup. Don’t use it until someone has looked t it. Hopefully, you have enough range to get you where you need to go or at least to a fast charger.

Scheduled Power Outages

Scheduled Power Outages are becoming more and more frequent with more energy drain on the grid. It certainly depends on where you live, but some states are more prevalent than others, i.e., California.

You should be notified when the power is going to be down. Generally, they turn the power down or reduce it just after a peak. Unfortunately, this is usually when EV owners charge their cars.

There just isn’t enough power to go around everyone some days, and the energy companies have to monitor and equalize the grid so they have enough for most of the time.

You can check if your power has been off by, as I said, looking at something that has a digital clock. It should be running a few hours behind.

On the plus side, it’s not a massive problem as you are given the heads up that it will happen. You can pre-plan how you will charge your car, so you have enough range on the days that the scheduled outage is planned.

Charging Timer On

The next common issue – your car has a charging timer set. This is a great way of charging your car using off-peak cheaper electricity. But your EV has to be plugged in for the charging schedule to work.

You might have forgotten to plug in, or you might have been away from your charger at the scheduled time and missed the allocated charging period.

The charging timer can be set up for a set amount of time and also for multiple days of the week.

There are certain situations where the charging timer will not work or activate. They are:

  • If the ‘Power’ switch is in the On position, the battery will not charge
  • If the charging station also has a timer set that is different from your vehicles
  • If the onboard computer senses the high voltage battery is too hot
  • If the charging timer is set for a particular location – Home – and you’re trying to charge elsewhere (only on Leaf models with Navigation installed)

Cable Problems

Cable problems are up there with power problems. Your Leaf charging cable is made of sturdy, heavy-duty plastic. But the reality is it bears the brunt of a lot of abuse. Not intentionally. Most people take very good care of their charging cable; when they unplug it, they loop it onto a hook until they need it again.

But life gets busy, and we forget to pack it away sometimes, and it gets driven on, shoved out of the way, and ultimately gets damaged.

If the car can’t create a full seal from the charge port to plug, no charging will occur.

It’s good practice to regularly inspect your cable, especially if more than one person uses it. Check for any cracks, nicks, or damage.

Only check when both ends are unplugged or disconnected. If you find any kind of damage, you need to replace the cable with a new one then. Charging cables cannot be repaired. Any leakage of voltage can cause serious injury or fatality.

Battery Too Hot

Nissan Leaf first sprang onto the EV market back in 2010. Initially, they were very popular, with little or no competition. They have sold 170,000 units in total, but a certain Mr. Musk put paid for that when he introduced Tesla on the scene.

That doesn’t mean there’s anything wrong with the Nissan Leaf, but Tesla has different ways of doing things.

When it comes to EVs, the most important element is the high-voltage battery. The high-voltage battery has to maintain specific parameters in terms of temperature. This is where the Leaf falls down.

The majority of recent EVs have applied the technology of coolant to keep the high-voltage battery at the optimum temperature.

The Leaf uses fans instead of coolant. This is not as efficient and leads to problems with the Battery Management System. If the temperature is too hot, the onboard computer will not allow charging to take place. This is especially noticeable if you are attempting to fast charge. Fast charging uses DC power which generates more heat in the batteries and so requires the fans to work even harder.

If you have fast-charged recently and find you need to charge again, the software will actually prevent you from doing so to protect the longevity of the battery.

It can lead to a Diode in the charge port malfunctioning. If you find that only one charge port is working, you’ll need to check the car with a dealer. Although not a big or involved job, it is to do with high voltage and should only be done by a qualified technician.

12V Battery Dead

All EVs, including the Leaf, have two batteries. The main high voltage battery that powers the car to move and an additional traditional 12V battery. Most EV brands use lead acid batteries; they are cheap and identical to the 12V batteries found in ICE cars. Some brands have recently started to introduce Lithium Ion 12v (actually about 15V).

Although they are much more expensive to produce, they are much smaller and much lighter than lead acid. The lighter weight is more beneficial in an EV for range factors; the lighter the overall vehicle, the further the range.

In the Leaf, the 12V runs all the auxiliary items such as locks, windows, etc., but it also runs the electronics that send the signal to allow charging to activate. This is a problem if the 12V is flat, as you won’t be able to charge your high voltage.

To boost your 12V, follow these steps:

  1. Put the vehicle in Park (P)
  2. Turn everything off
  3. The power switch can’t be moved from the OFF position
  4. Pop the hood and locate the 12V
  5. Connect the lumpers to the 12V (this has to be done in a specific order)
  6. Connect the Red (+) to Red (+)
  7. Connect the Black (-) to Black (-)
  8. Start the booster (either a boost pack or donor engine)
  9. Move Leaf to ‘Ready to Drive’ position
  10. Start your Leaf
  11. Remove the jumper cables in the reverse order as below
  12. Black (-) and Black (-)
  13. Red (+) and Red (+)

You will now be able to charge your high-voltage battery. Plug in and activate as soon as you have boosted your 12V. Do not attempt to drive your Leaf if the Power Limitation Icon is visible (Yellow Turtle). Wait until you have enough power and your range is consistent with your journey distance.

Other posts you might find useful:

Nissan Leaf won’t go into drive

Is Leaf charger waterproof?

Leaf won’t unlock

E John Cunningham

Hey, I’m John and I'm a technical writer here at EVjuicedup.com. I’m a Red Seal qualified Auto Service Technician with over twenty-five years experience working on Classic and Modern Cars. I've worked for GM, Jaguar, Land Rover, Volvo, Audi, and VW main dealers. Yep, I’ve skint my knuckles on them all!

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