Battery Saver Mode?

[TonyWhats]

What's up guys. Question about my 2019 PW, a few times this past week while driving I got a message about "Battery Saver Mode" and it all but disabled my radio. Owners manual did not mention anything about, and a limited google search kind of explained it to me. Has anyone experienced this and if so what was the cause? It's been cold in the Northeast and I'm assuming that could be a factor. My voltage displayed between 14-16V and didn't seem low enough to reduce the power to "non essential" functions.

Thanks for any help/insight.

 

[LeesEvoX]

Never heard of this. But im in the the knowledge

 

[wobly]

Here is a thread that covers it pretty well...
https://www.ramforum.com/threads/battery-save-mode.113533/

Looks like the Battery Saver Mode comes on when the vehicle is diverting more power to replenishing the battery than operating "non-essential" equipment.

 

[TonyWhats]

Here is a thread that covers it pretty well...
https://www.ramforum.com/threads/battery-save-mode.113533/

Looks like the Battery Saver Mode comes on when the vehicle is diverting more power to replenishing the battery than operating "non-essential" equipment.

Thanks for the info, I figured it was related to the cold weather.

 

[Breaker Alex]

Here is a thread that covers it pretty well...
https://www.ramforum.com/threads/battery-save-mode.113533/

Looks like the Battery Saver Mode comes on when the vehicle is diverting more power to replenishing the battery than operating "non-essential" equipment.

This post is about diesel engines though.
I wonder what could drain so much on a hemi cause we sure don't have that 200 amps intake heater.

 

[TonyWhats]

Does anyone know if there is a lower voltage value that triggers the battery saver mode? It's been an intermittent issue over the past 2 weeks. My voltage reading is typically between 14-16 and according to the gauge that's a middle reading. If it continues to happen I'll have a dealer take a look.

 

[RamCares]

Does anyone know if there is a lower voltage value that triggers the battery saver mode? It's been an intermittent issue over the past 2 weeks. My voltage reading is typically between 14-16 and according to the gauge that's a middle reading. If it continues to happen I'll have a dealer take a look.

Hi @TonyWhats, we were able to pull up some information on your concern from your owner's manual. According to page 115:

"In cases when the IBS detects charging system failure, or the vehicle battery conditions are deteriorating, electrical load reduction actions will take place to extend the driving time and distance of the vehicle. This is done by reducing power to or turning off non-essential electrical loads. Load reduction is only active when the engine is running. It will display a message if there is a risk of battery depletion to the point where the vehicle may stall due to lack of electrical supply, or will not restart after the current drive cycle.
When load reduction is activated, the message “Battery Saver On Some Systems May Have Reduced Power” will appear in the instrument cluster. These messages indicate the vehicle battery has a low state of charge and continues to lose electrical charge at a rate that the charging system cannot sustain."

If you have any additional questions or decide to address any concerns with your Ram dealer, please feel free to loop us into a private message for assistance!

Kathryn
Ram Cares

 

[crash68]

Does anyone know if there is a lower voltage value that triggers the battery saver mode? It's been an intermittent issue over the past 2 weeks. My voltage reading is typically between 14-16 and according to the gauge that's a middle reading. If it continues to happen I'll have a dealer take a look.

It's most likely the IBS which is mounted on the negative battery terminal. This is one of the times where pulling the battery cable could help as the IBS does its own "calibration" when it's powered up. When you loosen the clamp on the negative battery post, do not remove the nut from the bolt as you will break the clamp.
While you have the battery disconnected, make sure both the terminals are clean.

 

[Hittheroad]

What's up guys. Question about my 2019 PW, a few times this past week while driving I got a message about "Battery Saver Mode" and it all but disabled my radio. Owners manual did not mention anything about, and a limited google search kind of explained it to me. Has anyone experienced this and if so what was the cause? It's been cold in the Northeast and I'm assuming that could be a factor. My voltage displayed between 14-16V and didn't seem low enough to reduce the power to "non essential" functions.

Thanks for any help/insight.

I'm having the same issue with my 2017.

Battery Saver Mode issue

2017 Ram 3500 Laramie Longhorn 6.7L Cummins

Truck was not used for two weeks in -30 to -35C.
After this two weeks ( at -20C ) I plugged the truck block heater in for 4+ hours then tried to start the truck with Remote Start, would not start. Went out and started the truck in cab and let it warm up for 10+ minutes (have always had the truck set to turn the heated seat and heated steering wheel on for all starts). Winter front installed.
Drove for 20 minutes at 80km/hr to 110km/hr (Elk Island area to Sherwood Park, Alberta). All was good. Stopped at a store for about 30 minutes then on start up I had a "Battery Saver Mode" message. No radio, heated seats or heated steering wheel. Cabin heater worked. No other messages or warnings.
Drove about 5 minutes to next stop ( about 30 minute off time) and on start all worked. 5 minutes driving the radio, heated seats and heated steering wheel shut off.
Got home and put the batteries on a smart charger in place (-20C). Batteries were at 80%. After 24 hours of charging batteries did not get past 90%, charger went into alarm.
Suspected batteries were bad so pulled original ones and purchased new ones. Truck was without batteries for about 24 hours. Charged new batteries to 100% before install. Start-up on install was fine with no messages/warnings.
One week later (-18C) could not start truck remotely. Started truck in cab and Battery Saver Mode came up. After a good 10 minute warm up I drove for 20 minutes at 80 km/hr (again no radio, heated seats or heated steering wheel).
After first stop and start up all was good until 2 minutes down the road, back to Battery Saver Mode.
Got home and put the batteries on the smart charger again . Batteries were too low to read. Batteries would not charge past 80% in 20 some hours. (my charger goes into alarm if full capacity is not reached in 24 hours).
Yesterday I went into the control settings and turned the heated seat and heated steering wheel off on all start ups. Pressed the mute button on the stereo (have not found a way to turn the radio/amp off, only mute). I made these changes in Run position (not running). It put my charger into failure, batteries dropped to 11.5V because engine went to pre heat. Reset the charger and was able to get the batteries back to 100%. 100% was not achievable before this change.
Today (+8C) on start up, no Battery Saver Mode message, now showing a check engine light "Service DEF System, See Dealer".
Four years of same settings with no changes on my part and now having issues...I will not accept it's a cold weather issue...
Suspect heated seats, steering wheel, amp, DEF system (relays stuck?) and firmware update needed.
I kept the original batteries because I don't think there is anything wrong with them. Out of the truck I was able to charge both to 100%. Removed from charging, a few weeks later I metered them and they are still at 12.9V. Put back on the charger they came to 100% within minutes.
Am told these are AGMs (Johnson Controls 12V-56029635AC) but do not see any indication of this on the batteries, hope they are but no idea.
Was surprised when I removed the insulation covering my batteries. My truck is 2017, the batteries were manufactured in 2013.