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Monitor your voltage. If you are seeing 14+Volts at the same time you are getting the alert, at least you know that the "charging system" IS putting out the required voltage, and you won't be buying alternators and such, chasing that rabbit hole.

I get the feeling that these trucks and that dang bms system is measuring all kinds of parameters and something could trigger that alert but not actually be a threat.

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2017 XLT S-Crew 4x4
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73 Posts
Dropping it off... Finger tap to make it work is just anecdotal...
 
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2017 XLT S-Crew 4x4
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I believe it's a crushed wire and thanks snake, it is outputting 14.4 when running
 

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It seems like a lot of Ford owners might have this problem, but I'm not finding any solid information about it being a bug. My 2016 with about 32K miles on it is showing the error message about 30 seconds after cranking up. I've got what looks like a brand new battery with tight contacts at the battery. AutoZone put the ODB on it and didn't find any problems with the alternator (or anything else.) I did some volt-meter testing before going to AutoZone and didn't find any problems with the battery at rest or under load (A/C, lights, radio, fog lights etc.). AutoZone also tested the battery. It checked with no problems, but the employee said he thought the cranking voltage dipped too low during the starter test. It went down to around 9.1 on the line graph. This alert box never appeared before updating from SYNC 1.0 to SYNC 3.0.

Does anyone know what components can trigger this warning? It only comes up shortly after cranking. When the alert is dismissed, the red battery icon light stays lit. The alert box hasn't reappeared once it gets dismissed. I'm going to take a ferry and put this truck on a remote beach later this month and want to nip any electrical problems in the bud.

View attachment 145745 View attachment 145785
It seems like a lot of Ford owners might have this problem, but I'm not finding any solid information about it being a bug. My 2016 with about 32K miles on it is showing the error message about 30 seconds after cranking up. I've got what looks like a brand new battery with tight contacts at the battery. AutoZone put the ODB on it and didn't find any problems with the alternator (or anything else.) I did some volt-meter testing before going to AutoZone and didn't find any problems with the battery at rest or under load (A/C, lights, radio, fog lights etc.). AutoZone also tested the battery. It checked with no problems, but the employee said he thought the cranking voltage dipped too low during the starter test. It went down to around 9.1 on the line graph. This alert box never appeared before updating from SYNC 1.0 to SYNC 3.0.

Does anyone know what components can trigger this warning? It only comes up shortly after cranking. When the alert is dismissed, the red battery icon light stays lit. The alert box hasn't reappeared once it gets dismissed. I'm going to take a ferry and put this truck on a remote beach later this month and want to nip any electrical problems in the bud.

View attachment 145745 View attachment 145785
Just had the same issues for 2 wks. On my 2018 f150. New alternator, and battery still had the same issue. 63,000 miles and the dealer figured out it was a wiring issue prior to the alternator. $643.00 later for the rewire and fixed.
 

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2017 XLT S-Crew 4x4
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Do you know which wires were replaced? Would be awesome to know for future reference. 😎 🤙
 

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2013 Ford F150 XLT 3.5 EgoBeast SuperCrew 4X4, 3.55 axles, 9.75" w/elocker
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expensive wiring job
 
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