Volvo Owners Club Forum - View Single Post

GMcL · Apr 26th, 2024, 10:45

Does your charger (MrM83) have a recondition option ? It looks like your main battery has/is sulphated.

The 13+v reading is when your engine is running or 400v traction battery is driving the car, not the 12v battery.

When you connect the battery to the charger connect the negative lead from the charger to the body, not the -'ve terminal of the battery or the end of the -'ve battery lead where it connects to the body this can give a false reading in the BMS.

My 2020 Ford Focus is doing the same thing, I have ordered a replacement AGM battery with a higher CCA value though same Ah number. When I switch off, the battery is showing 12.7v which drops to 12.4v within an hour, overnight this drops to 12.19v before I start the car. Anything lower and I am risking being stranded. My car is throwing ABS, steering angle and front camera errors, active cruise control is dropping out with the camera issue.

Apr 26th, 2024, 10:45	#19
GMcL 0's and 1's Last Online: Today 07:40 Join Date: Nov 2006 Location: -	Does your charger (MrM83) have a recondition option ? It looks like your main battery has/is sulphated. The 13+v reading is when your engine is running or 400v traction battery is driving the car, not the 12v battery. When you connect the battery to the charger connect the negative lead from the charger to the body, not the -'ve terminal of the battery or the end of the -'ve battery lead where it connects to the body this can give a false reading in the BMS. My 2020 Ford Focus is doing the same thing, I have ordered a replacement AGM battery with a higher CCA value though same Ah number. When I switch off, the battery is showing 12.7v which drops to 12.4v within an hour, overnight this drops to 12.19v before I start the car. Anything lower and I am risking being stranded. My car is throwing ABS, steering angle and front camera errors, active cruise control is dropping out with the camera issue. __________________ 2011 Volvo S60 D3 R-design Premium - 2020 Focus ST estate automatic - 2020 KIA eSoul 150kW 64kwh EV Previous: 2005 Volvo S60 D5 Sport - 2017 Focus RS Last edited by GMcL; Apr 26th, 2024 at 11:03.