Hight Voltage Battery overheating during charging on L2 after OTA

[Gimme_my_MME]

So they are hoping the recall updates fixes the issue

It will not

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[Schmedlack]

I called the dealer for an update and service rep told me the tech wanted to see my Lvl1 ford charger - maybe they wanted to replicate the issue? Or thinks it's the charger.. not sure. Not expecting to get my car back today - need to figure out a way to get to work tomorrow

i see that they are charging it using a 9W Lvl 2 charger and it's almost fully charged.. so hoping they don't see that as a - car is fine thing

Sid - I think that your home charging station is OK. If the charging station was defective, the HV battery could not "warm up" to 90F.

The root cause is that an SOBDM software update causes the Cabin and Battery PTC heater to incorrecty turn on. This causes the symptons described on this thread, including HV Battery discharge.

An easy to follow, step-by-step procedure is essential for a cost effective repair. I suspect the procedure will reload SOBDM firmware. The procedure must conclude with a series of steps which verify proper charging.

For verification, every reloaded vehicle should recieve a "test charge". Here, an OBDII scanner measures the HV battery temperature before and after a 10kW charging session. To pass, any temperature increase must fall within a range specified by Ford.

I hope that your car comes back ready to charge and drive for many pleasurable years.
Keep posting.

 

[ZedThou]

Sid - I think that your home charging station is OK. If the charging station was defective, the HV battery could not "warm up" to 90F.

The root cause is that an SOBDM software update causes the Cabin and Battery PTC heater to incorrecty turn on. This causes the symptons described on this thread, including HV Battery discharge.

An easy to follow, step-by-step procedure is essential for a cost effective repair. I suspect the procedure will reload SOBDM firmware. The procedure must conclude with a series of steps which verify proper charging.

For verification, every reloaded vehicle should recieve a "test charge". Here, an OBDII scanner measures the HV battery temperature before and after a 10kW charging session. To pass, any temperature increase must fall within a range specified by Ford.

I hope that your car comes back ready to charge and drive for many pleasurable years.
Keep posting.

If scheduling the car for service at the local dealer, will the technicians be aware of this? Should I wait until this problem is more widely-known before making an appointment? I'm puzzled that there haven't been more complaints about this issue. Is it confined to only a few cars? That seems unlikely.

 

[kronstein]

If scheduling the car for service at the local dealer, will the technicians be aware of this? Should I wait until this problem is more widely-known before making an appointment? I'm puzzled that there haven't been more complaints about this issue. Is it confined to only a few cars? That seems unlikely.

I’m not positive on this one. Today Ford rep on this forum told me to get a 23S56 recall, I bet it’s a part of their playbook
Why would I go for a recall if all started after an OTA update?

 

[naturalctx]

If scheduling the car for service at the local dealer, will the technicians be aware of this? Should I wait until this problem is more widely-known before making an appointment? I'm puzzled that there haven't been more complaints about this issue. Is it confined to only a few cars? That seems unlikely.

It is a concern that affects people only on the fringes of charging. Most don't notice the problem, only slower L2 charging at home AND increased energy costs on their electricity bill thanks to even less efficient charging. The only time it becomes an issue is when you are using an L1 charger and the car actually loses charge percentage slowly over time instead of gaining. @Ford Motor Company fix this and stop pretending it is not a problem!

 

[sid234]

It will not

Yeah - just checked. Plugged car in at 83% 1hr 3mins ago, now its at 81%. Charging with my Lvl 1 charger at 1kW charge rate.

Don't really want to go to the dealer again till Ford has a released fix - i dont want to get charged $150 by the dealer for "diagnostic check" and have issue blamed on my lvl 1 charger as the 9kW charger on site charges the car fine.

 

[Matstar]

Don't really want to go to the dealer again till Ford has a released fix - i dont want to get charged $150 by the dealer for "diagnostic check" and have issue blamed on my lvl 1 charger as the 9kW charger on site charges the car fine.

The 9Kw will not charge fine. It will charge much slower than if it was plugged into a car without the problem.

 

[ZedThou]

What I see on a 7 kW L2 charger is that all of the energy first goes into heating the battery until it reaches 50° F (about 10 minutes or so if it started around 32° F) before the battery charges. This doesn't really draw much energy from the battery because the charger is powerful enough to provide it.

See the "EV Battery Power," "HVB Coolant heater" and "HvbT" numbers on the attached screenshots.

On the L1 charger it's a completely different story, obviously.

 

[naturalctx]

Update for any tracking: Ford reached out to me yesterday and scheduled a service visit at my local dealer. Ford engineers will be working with the EV tech to troubleshoot and resolve....on 2/8/24 which was my dealer's next available service appointment. Parts may possibly take up to a month if there is a real problem outside of the software bug, and I get a Ford loaner in the meantime...6 weeks from now.

 

[katumba1]

Update for any tracking: Ford reached out to me yesterday and scheduled a service visit at my local dealer. Ford engineers will be working with the EV tech to troubleshoot and resolve....on 2/8/24 which was my dealer's next available service appointment. Parts may possibly take up to a month if there is a real problem outside of the software bug, and I get a Ford loaner in the meantime...6 weeks from now.

They should hopefully have a fix by then!

 

[naturalctx]

They should hopefully have a fix by then!

Well, seeing as how I brought this issue to Ford's attention first on 11/4 when I noticed it....I won't hold my breath.

 

[KevinS]

So is the best way to tell if your car has this issue to use the Ford charger as an L1 unit on a 120V outlet?

 

[Gimme_my_MME]

So is the best way to tell if your car has this issue to use the Ford charger as an L1 unit on a 120V outlet?

Yes

 

[Gimme_my_MME]

Yes

If you do not regularly charge on L1 or low power L2, the likelihood this impacts you is infinitesimal small

 

[KevinS]

Yes

Thank you - that's an easy enough way to eliminate (or amplify) anyone's anxiety.

If you do not regularly charge on L1 or low power L2, the likelihood this impacts you is infinitesimal small

I do often have to do L1 when visiting family/friends not close to L2 chargers, but have a 32A l2 charging setup at home. So, not freaking out, but am curious.

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