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U014B Lost Communication With Hybrid/EV Battery Inductive Charging Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U014B covers the vehicle-side controller of a wireless charging system. Inductive charging transfers energy without a plug, through a coil in a ground pad and a receiving coil under the car; the SAE J2954 standard, finalised in 2020, defines power classes of 3.7, 7.7 and 11 kW and relies on resonant coupling with about 85 percent efficiency. The module on board rectifies the received power, checks alignment and reports to the battery and charge controllers; if its messages stop, those controllers log U014B. No manufacturer documents the code publicly, and wireless charging is still rare in series production. The practical effect is that wireless charging does not start or is interrupted, while charging by cable and driving normally continue. U044C covers invalid data from this module.

Likely causes

Supply, fuse or ground of the inductive charging module missing
Wiring or connector to the underbody receiver damaged by water, salt or impact
Software of module and charge controller not matching
Inductive charging module internally faulty

Symptoms

  • Wireless charging does not start or stops
  • Charging warning message, cable charging still works
  • Module not reachable with a scan tool

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–1,500
Time0.5–4 h

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

Parts involved

inductive charging modulecan bus

Related codes

U044CU0111U014AU014C

References: en.wikipedia.org, en.wikipedia.org, law.cornell.edu.