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U044C Invalid Data Received From Hybrid/EV Battery Inductive Charging Module

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

U044C covers the module that controls inductive charging of the high-voltage battery: a receiver coil and electronics on the vehicle take energy from a ground pad without a cable and must agree with the charger on alignment, power and battery limits. A receiver such as the battery or vehicle controller stores U044C when the module's frames arrive but hold invalid status or power values; U014B is lost contact. No manufacturer documents U044C publicly. BMW ran such a system as a field test with 200 530e iPerformance cars in California (SIB 61 23 19), with a ground pad module paired over WLAN, and only a few dealers equipped to diagnose it. The likely result is an interrupted or refused wireless charge, while charging by cable and driving normally remain possible.

Likely causes

Poor alignment or disturbed link between vehicle unit and ground pad

Software of the inductive charging module not matching the battery controller

Internal fault or overheating of the inductive charging module

Symptoms

Wireless charging does not start or stops early
Charging system message in the display

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€80–1,500

Time0.5–3 h

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

Parts involved

inductive charger module

Related codes

U014B U044B

References: static.nhtsa.gov, en.wikipedia.org.