murphy

If the gas in the tank gets to be 18 months old the car will run the engine until it is down to 1/8 of a tank. However putting in a 1/2 tank of new gas should have aborted the "burn". There is also an oil maintenance mode. I don't recall ever seeing that in my car. I keep my tank at less than 1/4. That's less weight to haul around in electric mode.

From the 5 kW resistance heater. Or if it is hotter outside than your setting bring in hot outside air.

There is one thing unique about reverse. It is not possible for the engine to move the car in reverse. Reverse is only done with an electric motor.

That is the way to do it. I think the problem is too many people don't read their Owner's Manual and don't know there is a real key inside of the electronic key.

The FFE gets its heating and cooling air from the cabin. The thought process was probably that the battery likes the same environment as the occupants of the vehicle. My Tesla has liquid heating and cooling for the battery. When the battery is cold soaked there is very little charging going on until the battery heater brings it up to a suitable temperature. Note that it can use the battery itself to power the battery heater as long as the SOC is above 20%. Us arm chair quarterbacks need to recognize that the designers of the vehicles knew what they were doing.

Have you also not been driving the car? When the engine is running it is charging the hybrid portion of the battery if the main portion is empty. I have been charging my car every winter since I got it in April 2013. Ford designed the battery and its systems. Only they are qualified to make pronouncements like that. There is nothing in the owner's manual about not charging below freezing. Presumably the charge rate is lower for a really cold battery but the process of charging will warm the battery. Just so there is no confusion, there is only one battery. 1.5 kWh of it is allocated for hybrid mode. The engine is started by drawing power from the High Voltage Battery (HVB). The car can't be driven just using the engine. The electric motors and the HVB are always involved. It is not possible for the engine to move the car in reverse. Reverse can only be done with one of the electric motors. Charge your car and drive it. There is no "below freezing" restriction.

Read your owner's manual. There are battery terminals under the hood. Look for a red flexible plastic boot directly in front of the driver's seat. That is the positive terminal. Standing in front of the car and the red plastic boot look straight back toward the driver's seat. There is a long bolt sticking up out of the shock tower. That is the negative terminal. Connect another battery or a battery charger there and you can start the car. You can't reach the trunk release handle with your arm but there are any number of tools that could be used to grab it.

Cold does not put stress on the battery, it simply reduces its efficiency. If you keep the cabin at a temperature that is comfortable for you the battery will also be comfortable since its cooling or heating air comes from the cabin through an inlet located on the package shelf. That assumes you don't have packages on the shelf blocking the air intake opening.

I'm retired. I put gas in my Energi once or twice a year. And spring through fall my electricity comes from PV solar panels on the roof of my house. Winter is problematic since they don't work when they are covered with snow.

This time of the year you will get about 10 miles of electric driving if you turn the heat on. In electric only mode the cabin heat comes from a 5 kW resistance heater. I recommend using a GO time to warm up the cabin while still plugged into your electric supplier. Note that a 240 volt EVSE is needed for this to work. The 120 volt EVSE, that comes with the car, has a maximum of 1440 watts. Battery efficiency drops quickly in cold weather. I am 35 miles north of Philadelphia.

Did you have the fob and your cellphone in the same pocket?

Have the 12 volt battery load tested with at least a 100 ampere load. I would also put new batteries in the fob. It is also possible that the DC to DC converter, that provides 12 volts while the car is on, has a problem.

Yes put a trickle charger on the 12 volt battery. It will very likely be dead after three weeks if you don't. The HVB is completely disconnected by contactors when the car is off. The only loss is from self discharge. In three weeks it will be very close to where it was at the start of the three weeks. 50% is a good place to leave it at for the three weeks.

The heater is a 5 kW resistance heater. The A/C compressor doesn't use anywhere near that much power.

Check your 12 volt battery. If it is the original it is due for replacement. Low battery voltage, without actually going to zero, can cause intermittent problems with electronics.

#10 fuse in the panel that is above and to the left of the driver's feet.

Disconnect the negative lead of the 12 volt battery for a couple of minutes to reset the modem. It can also be done by pulling fuse #10 but that is way harder than pulling the battery cable.

All of my electricity for car charging comes from the 10 kW of PV solar panels on the roof of my house. Since they were installed in September 2013 they have generated 50.4 MWh (50,400,000 Wh) of electricity.

Sustained cold weather will put a large dent in your battery mileage especially if you use the heater.

No. See your other post.

You do not need to keep it plugged in to the HVB charger. The HVB will not lose any energy, other than minimal self discharge, since it is completely disconnected by contactors when the car is off. You do need a smart battery charger (a charger plus a maintainer in the same package) connected to the 12 volt battery terminals under the hood to keep the 12 volt battery from being discharged. When the car is off all power comes from the 12 volt battery. When the supplied EVSE is used to charge the HVB it is also used to charge the 12 volt battery after it finishes charging the HVB. Once that finishes it will not charge the 12 volt battery again unless another HVB charge cycle happens.

I still have my 2013 Energi for trips to the grocery store, the doctor and dentist, and Lowe's which are all less than 20 miles round trip. I put about 1 gallon of gas in it per year. I also expected that Ford would have something better by 2017. I have a 2016 Tesla model S90D for destinations farther than 10 miles away.

If Ford felt it was necessary to not fully charge the battery they would have provided a method to do that. Instead, by default, the battery is always fully charged. If the battery is not fully charged the 12 volt battery is never charged from the wall. I've said this many times but apparently no one believes me. A 100% charge on the car screen is NOT a 100% charge of the actual battery. They selected a range within the actual battery capacity to operate the car. It is designed to last for the life of the car. If it gets past the infant mortality period it is unlikely there will be any future problems during the design life of the car. I don't know what that is but I have never kept a car more than 10 years.

The heater is a 5 kW resistance heater. If it takes 15 minutes to warm the cabin that's 1.25 kWh that isn't available for propulsion. Using GO times, at 240 volts, to prewarm the cabin, will greatly reduce the loss due to heater use.

A 100% charge indication in your car is NOT an actual 100% charge of the battery.