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Voltage Auto Service specializes in advanced hybrid, plug-in hybrid and EV diagnostics. Schedule an appointment to have the fault properly tested before replacing parts.

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.

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