Network, generic

U049C Invalid Data Received From Battery Charger Control Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U049C means the on-board charger, battery charger control module A, is heard on the bus but reports values the battery controller considers invalid. Ford's 2019 OBD summary for hybrid and plug-in vehicles has the BECM set it when the charger's CAN signal shows invalid states for 5 s; U019B is the same charger missing for 5 s. Ford calls this unit SOBDM or BCCM: it turns mains AC into high-voltage DC and also feeds the 12 V battery. Ford TSB 24-2445 (2023-2024 Mustang Mach-E) finds U049C in the BECM when DC fast charging fails with an error on the charger, and cures it by reprogramming the SOBDM. Charging is refused or stops while driving stays normal; Ford flags charger faults with the amber wrench lamp.

Likely causes

Charger module software reporting invalid states, cured by reprogramming
Software levels of charger and battery controller not matching
Internal fault of the on-board charger

Symptoms

  • High-voltage battery does not charge, error shown at the charging station
  • Charge fault message or wrench lamp in the cluster
  • Driving itself unaffected

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€0–2,500
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

on board charger

Related codes

U019BU0412U0293

References: fordservicecontent.com, static.nhtsa.gov.