Ford Fusion Hybrid Battery Age Sensor

Asked by Feb 15, 2019 at 06:02 PM about the 2010 Ford Fusion Hybrid

Question type: Maintenance & Repair

My hybrid system stopped working a month ago.  I took it into a dealership and eventually it was discovered that the computer sensed the battery to be over 9 years old and instructed the hybrid system not to work.  If the sensor was told that the battery was only 1 year old (over riding the system), the hybrid components worked again.  Is this normal?  What is the reason for this?

28 Answers

60

The same thing happened to me in my 2010 Fusion Hybrid with 65k miles on it a 2 months ago! The EV Power indicator gauge doesn't show a bar anymore. It used to show at least 2 green 'bars' and kick into quiet EV mode under 40mph. Now the car constantly idles at a stop, ruining the MPGs [from 38 to about 28 now]. Looks like an easy fix or programming, I wish I could do. ~ LS

2 people found this helpful.
40

Do you have contact info for the dealer and service rep. that did this? I'm aware of several 2010 FFH owners (myself included) that are having the same problem, but our dealers have no idea how tofix it.

1 people found this helpful.
60

I am still working with my dealer - I had to get my FFH after they had it fo 3 days [without giving me a loaner car!] and still no answer. I have it scheduled Wed with a loaner car and I am going to stand my ground and refuse to pay for the diagnostic charge of $180 since I needed my car the last time and they couldn't help me out with one.

40

I'm dying to know if this really works!

2 people found this helpful.
60

Yes, that fixed it. We had to let the car sit for a few hours, then it reset and worked properly - as if it never happened.

1 people found this helpful.
60

What fixed it? Just let the car sit for a few hours? Mine never resets itself and no EV mode. Am I missing something?

10

Guru5TQM: Give us an idea where this dealer of yours is. Apparently they're the only one in the country, including the Ford Customer Service (SIC. What a joke they are) that seem to know what they're doing.

1 people found this helpful.
40

I'm with Larry, but ask that you please post the name and phone number of the dealer and the name of the service rep that fixed your hybrid. They might be thre only ones in the country that have actually figured this out.

1 people found this helpful.
60

HI - Yes, the tech finally fixed the prob! He said the Ford Hotline had him run through a ton of codes and tests. After all said and done, the date was 'reset' to an earlier time. I don't know the exact way/how, etc [I would have done myself - if anyone knows, LMK!] So the EV/battery date was tricked into a younger version and all works well. The car is not idling at a stoplight anymore - thank goodness because I'm getting great gas mileage again - 28mpg to 38mpg]. Chat with Brewster Ford in Brewster, NY.

3 people found this helpful.
60

Thanks GuruL5TQM . My Fusion (2010) goes in EV mode at/before stops but as soon as I let the brakes go it will switch to gasoline.As far as battery age goes it might need dealers special software to trick it.I reset the computer by disconnecting the battery but no change.I'm in Ontario Canada and it is still cold outside. Will let you know when it worms up....

1 people found this helpful.

Would love to hear more about this if your mechanic ends up giving you the specifics on what he did. I just bought a 2010 at auction, as luck would have it, and find myself stuck with the same issue. Otherwise, I love the car, but my purchase timing is frustrating, to say the least.

60

It was a bit warmer the other day here in Ontario Canada and the car was a tiny bit better at least it rolled in EV mode. As soon as I touched the gas ...switched to gas. There is some hope for the summer (maybe).

1 people found this helpful.

I'm pretty certain every 2010 is facing this issue(I imagine the 2011's will see in a year as well). I've had my 2010 Fusion for 8 years and it went from full battery power available, to a minuscule amount seemingly overnight. I have 150,000 miles on mine and I've found that others with only half the miles are experiencing the same issue, so I believe it's a deliberate programming choice Ford made. If anyone is still actively trying to figure out how to reprogram the computer that controls the battery, please keep us updated!

I have a Fusion 2010 HY. that has the same problem that above, but the car turns off when driving some times, and the dash show the red Stop Safely Now message triangle, so i'am not sure if this it's the samebattery age problem or another one. Do somebody have had experience this too..?

This it's the message and icon thet shows when the car turns off by it self.

The "stop safely now" message is not related to the HVB battery age issue. Quite a few of us on the Ford Fusion Hybrid forums have noted the HVB issue and not a single one had that message. That said, we've had numerous reports that some dealers are able to program the car's computer into thinking it's a new battery. I plan on having this same procedure done on my car. There are no service bulletins for this issue either.

60

Yes you are right the stop safely now message is fixed after I fixed the easy fill issue the valve was stuck open . Than I disconnected the HV battery and the 12v battery for about 15 minutes that reset the age and the computer at the same time now it is much better drives like before in green mode. Use safety gloves for high voltage up to 1000volt when you disconnect the HV battery.

2 people found this helpful.

My dealer refused to do this procedure as it wasn't "ford recommended". Boucher Ford Menomonee Falls Wisconsin. I will try a different dealer in the area.

Programed obsolescence. After my dealer fixed it, they repeatedly asked Ford why they shouldn't do it - the company according to my dealer "Dodged the question"

My dealer did it in Des Moines, IA. They knew exactly what the issue was and reset it to 1 year for the HVB reset. My car drives exactly how it used to now. It easily gets me well over 40mpg in town when it's warm out and can drive in EV mode up to 47mph again. It also got rid of the "acceleration lag" I was experiencing.

30

Here is the solution to the fix, I posted in this forum over there. You can read the details on how to fix this yourself. Relatively easy to do. https://www.fordfusionforum.com/topic/19361-my-instructions-on-restoring-the-hybrid-ev- function-on-the-ford-fusion-hybrid-approaching-the-89-years-mark/

3 people found this helpful.

Trying to do this but have to wait for an admin to approve my forum login on forscan. Laammeee

30

THANK YOU VERY MUCH ALLEN...Got an ELM adapter, FORScan software. Downloaded the drivers for the adapter. Followed your instructions on restoring the hybrid ev function. I set mine for 5 years (is as long as I've owned the car) Like magic, I have E.V. mode again. And can hypermilage again. I like my car again. Like seeing 40-60 mpg for a few mile trip doing errands. Less impressed with Ford now though. Had thought about HVB replacement or re-balancing. Decided against it because of cost. Nothing wrong with the High Voltage Battery other than how Ford programmed the BECM. Get the word out. Let other FFH owners know about this issue.

3 people found this helpful.
20

I just went to Brewster Ford in Brewster NY and the Service Manager refused to adjust the battery age. They knew exactly what the issue was but refused to do it. Said it was a liability for them to do it. I also tried the solution noted on the Ford comment site. You buy a device that hooks into the electronic port under the driver side dash, then hook it into a laptop computer. To make it work you need to download software. When I went to the website to download the software, my Norton anti-virus blocked the site. Said it was a known site for malware. I stayed away. Unfortunately, I still have the problem that everyone else is having with the 2010 Fusion Hybrid battery. The thing is the Prius uses essentially the same battery technology and they get 250,000 miles out of their batteries. Ford is just being overly cautious. Mostly what we need is someone with a $5,000 fancy scan tool to reset the battery age on the car computer back to year 1. Nickel Metal Hydride batteries are very reliable and safe. I could not fine a single instance of it catching fire, which is Ford's concern.

1 people found this helpful.
60

I did the age reset as Allen with the Forscan and an OBDII it works fine for now I have the old gas saving and EV mode as before. If you live in the GTA I might be able to help you . Contact me tomkun2008@gmail.com

2 people found this helpful.
20

I got it to work. I used an old computer that I was going to throw away so if I got a virus, so what. I did not get a virus. I also used the slightly cheaper OBD connector: FORScan OBD2 Adapter, bbfly VINT-TT55502 ELMconfig ELM327. $18.97 on Amazon. Worked fine. I assume it will take a little driving for the car to retrain itself, but a 23 mile drive on back roads under 45 mph mostly, I got 46 mpg. (I use cruise control a lot) The engine did not automatically kick in after I took my foot of the brake. The lag in the transmission kicking in from a stop is also gone.

1 people found this helpful.
40

Thanks Allen! I just did the forescan OBD2 fix myself, works like a charm!

10

Is there any way to tell a date on this battery to know if it has ever been replaced?

1 people found this helpful.

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