High-Voltage Battery Warning

[redsparow1]

Checking to see if anyone has had a similar experience. 2021 Powerboost with 29K miles. I towed my camper back about 80 miles, disconnected but never shut off the truck. I pulled out of the storage lot and got an error message that the onboard generator wasn’t available, I clicked okay. A few seconds later I switched the truck to eco mode from tow mode. As I hit the gas I lost power and got the stop safely message. I coasted off to the side and I couldn’t get the struck to restart. After about a half hour of sitting by the roadside I was available to get the truck restarted using the remote start on the fob. I was able to get it home then started again and to the dealer a few days later. The FordPass app said High-Voltage Battery warning occurred. The dealer says that they can see a message saying driver side LED failure a few times over about a 5 day period. I am waiting to hear more, the tech hasn’t diagnosed yet. Anyone live through this? What should I expect?

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[Snakebitten]

Could very well be a one-off occurrence. The alert can be triggered by something as simple as the HV battery SOC dropping below some threshold. (I believe that threshold is somewhere near the mid 30's%)

I'm not saying that's for sure what happened, but it sounds like it could be something like that. And it might be impossible for any technician to reproduce the error.

I don't think the LED DTCs are related.

 

[redsparow1]

Thank you, I am still new to all this. If the ICE had been running for a couple of hours wouldn’t it be unusual for the SOC to be low though? I fully concede I could be way off on my understanding of how the truck works.

 

[Snakebitten]

Thank you, I am still new to all this. If the ICE had been running for a couple of hours wouldn’t it be unusual for the SOC to be low though? I fully concede I could be way off on my understanding of how the truck works.

I'm talking about the SOC of the HV battery. The normal SOC operating range for that battery is 42%-63%. It can go from the bottom of that range to the top, or vice versa, within a couple of minutes. And often does.

It's really difficult to know precisely, or guess for certain, what is going on with the Powerboost unless you are monitoring the PIDs associated with the electrical portion of the truck.

I experienced the Stop Safely Now alert only once, but was fortunate to see the SOC of the HV battery at about 34%. I knew that was below any SOC that I ordinarily would see. I was close to home, so I turned around and headed for safety before I turned the truck off. But by the time I got back to the barn the SOC had recovered and back well within the normal operating range.

I ended up just leaving the property again and went on to the office. Never have experienced it again.

Here is what the PIDs look like for monitoring a Powerboost:
(53.8% is in the heart of the normal operating range)

 

[redsparow1]

Thank you for clarifying, I didn’t realize that SOC would fluctuate that must.

 

[Ford Motor Company]

Checking to see if anyone has had a similar experience. 2021 Powerboost with 29K miles. I towed my camper back about 80 miles, disconnected but never shut off the truck. I pulled out of the storage lot and got an error message that the onboard generator wasn’t available, I clicked okay. A few seconds later I switched the truck to eco mode from tow mode. As I hit the gas I lost power and got the stop safely message. I coasted off to the side and I couldn’t get the struck to restart. After about a half hour of sitting by the roadside I was available to get the truck restarted using the remote start on the fob. I was able to get it home then started again and to the dealer a few days later. The FordPass app said High-Voltage Battery warning occurred. The dealer says that they can see a message saying driver side LED failure a few times over about a 5 day period. I am waiting to hear more, the tech hasn’t diagnosed yet. Anyone live through this? What should I expect?

Hi there! Will you send us a message with your VIN and your local Ford dealer? I can look into things on my end.

 

[redsparow1]

Thank you for your help, message sent.

 

[Gros Ventre]

I'm talking about the SOC of the HV battery. The normal SOC operating range for that battery is 42%-63%. It can go from the bottom of that range to the top, or vice versa, within a couple of minutes. And often does.

It's really difficult to know precisely, or guess for certain, what is going on with the Powerboost unless you are monitoring the PIDs associated with the electrical portion of the truck.

I experienced the Stop Safely Now alert only once, but was fortunate to see the SOC of the HV battery at about 34%. I knew that was below any SOC that I ordinarily would see. I was close to home, so I turned around and headed for safety before I turned the truck off. But by the time I got back to the barn the SOC had recovered and back well within the normal operating range.

I ended up just leaving the property again and went on to the office. Never have experienced it again.

Here is what the PIDs look like for monitoring a Powerboost:
(53.8% is in the heart of the normal operating range)

It doesn't make sense that the SOC of the HV Battery would fall below its minimum setting unless the engine were commanded to start & charge and the engine failed to start. I keep harping on an intermittent, such as a loose connector plug, and this seems to be similar.

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