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For the last month, my 2023 3.5 EB has been going in and out of Battery Saver Mode frequently. It is driven every day and when it is in Battery Saver Mode the battery shows a voltage of around 12.11 volts - not supposed to go into Battery Saving Mode until the battery voltage drops to 9.6 volts. The battery was checked by my Ford dealer last month and tested good. Any ideas on what might be causing this?
For the last month, my 2023 3.5 EB has been going in and out of Battery Saver Mode frequently. It is driven every day and when it is in Battery Saver Mode the battery shows a voltage of around 12.11 volts - not supposed to go into Battery Saving Mode until the battery voltage drops to 9.6 volts. The battery was checked by my Ford dealer last month and tested good. Any ideas on what might be causing this?
Dealer is lying to you. You need a new battery. They always say it's good because they can't help being incompetent. A AGM battery is at zero state of charge at 11.65 volts. Get a new battery asap and save yourself the headaches. 12.11v is about 60% state of charge.
Last edited by fatty 239; Feb 17, 2025 at 12:11 PM.
12.1 is close to 60% SOC, not 33% for a AGM battery type.
9.6V SOC is a near dead Battery, >>> not a saving Battery... level.
Only time you will see 9.6 v on a reasonable Battery age. is during momentary cranking load voltage drop on a Battery still able to work properly and recharge successfully during driving cycles.
The 9.6 v during cranking is mostly drop in the cables adding to the Battery drop in series.
My 2018 5L has a 4 year old MC H6 AGM Battery that results in drops into the 9.6.7 range at cranking, but still turns the engine over smartly in winter temps., after setting over night.
Verified both with a DMM pugged into a Power port and the Dash in Engineering Mode, stepped to the Voltage display reading. Both readings agree with the DMM more accurate at two places to the right of the decimal point.
After starting, the voltage comes up to full charge point after several seconds as it is programed to do. The charge voltage voltage is at 14.7 max., on an aged battery and proper charge control. This voltage forces Alternator current back into the Battery and supplies the rest of the vehicle needs.
As the Battery recovers, the 14 volt charge rate should reduce some to the point it needs to deliver the full time vehicle power needs.
If there is some other drain, it changes the power drain or charging. It will be reflected in overall system performance as a hint there is an issue, providing the vehicle drive time is sufficient.
Good luck.
Come to central Wisconsin for the next week, let your truck battery run down and freeze up in the Frigid negative night time low temps. That's about the only short answer available on a cure.
Driving it to the dealers the battery will show good enough to send you on your way. Have it towed in dead then they may replace the battery.
12.1 is close to 60% SOC, not 33% for a AGM battery type.
9.6V SOC is a near dead Battery, >>> not a saving Battery... level.
Only time you will see 9.6 v on a reasonable Battery age. is during momentary cranking load voltage drop on a Battery still able to work properly and recharge successfully during driving cycles.
The 9.6 v during cranking is mostly drop in the cables adding to the Battery drop in series.
My 2018 5L has a 4 year old MC H6 AGM Battery that results in drops into the 9.6.7 range at cranking, but still turns the engine over smartly in winter temps., after setting over night.
Verified both with a DMM pugged into a Power port and the Dash in Engineering Mode, stepped to the Voltage display reading. Both readings agree with the DMM more accurate at two places to the right of the decimal point.
After starting, the voltage comes up to full charge point after several seconds as it is programed to do. The charge voltage voltage is at 14.7 max., on an aged battery and proper charge control. This voltage forces Alternator current back into the Battery and supplies the rest of the vehicle needs.
As the Battery recovers, the 14 volt charge rate should reduce some to the point it needs to deliver the full time vehicle power needs.
If there is some other drain, it changes the power drain or charging. It will be reflected in overall system performance as a hint there is an issue, providing the vehicle drive time is sufficient.
Good luck.
I joke that this is the disable auto start/stop solution. My start/stop hasn't worked for six months because the battery won't charge to a high enough voltage for it to function regardless of how far I drive. My local Ford dealer has checked my battery twice, and both times say it's within spec. If my truck goes for a day without running I get a message on Ford Pass ap that says 'Remote features disabled to preserve battery'.
It's a shame we pay this much money for a truck with a junk battery/battery monitor system.
For the last month, my 2023 3.5 EB has been going in and out of Battery Saver Mode frequently. It is driven every day and when it is in Battery Saver Mode the battery shows a voltage of around 12.11 volts - not supposed to go into Battery Saving Mode until the battery voltage drops to 9.6 volts. The battery was checked by my Ford dealer last month and tested good. Any ideas on what might be causing this?
Welcome to the forum. Do you make long drives or is it short runs into town and back? I use mine everyday but my drive to work is like 5 miles so every other weekend, I put mine on a charger because of the short drives.
Battery Saver Mode Issue
