2017 Ford Fusion SE Hybrid – 12-Volt Battery Not Charging With U3000:04
- Aug 16
- 1 min read
CUSTOMER CONCERN
The 12-volt battery is not charging and the DC/DC converter module stores DTC U3000:04.
CAUSE
The 12-volt battery failed and could not accept or maintain the converter's charging output.
CORRECTION
Remove and replace the failed 12-volt battery, clear DTC U3000:04, and verify the DC/DC converter charges the low-voltage system normally.
