Network, generic

U0141 Lost Communication With Body Control Module A

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0141 names the first of several body controllers. Unlike U0140, which stands for the single main BCM, the letter suits cars that spread body tasks over more units, and each maker decides which one is A. Mitsubishi uses U0141 for an ETACS timeout: its body controller ETACS-ECU stops sending, and keyless entry, liftgate, airbag, brake and steering units log the loss; bulletin TSB-19-42B-003 revised the procedure for Outlander, Lancer and Outlander Sport up to 2019. FCA labels the module IPM (BCM) or, in older airbag lists, the front control or totally integrated power module; on the 2021 Chrysler 300 a PCM flash cures a MIL that comes with it. On the 2023-24 Audi e-tron the gateway stores U014100 when the ignition will not switch on, cured by a software update of the comfort control unit J393.

Likely causes

Power, fuse or ground of body module A missing
Software of module A or of the listener needs updating (Audi J393, FCA PCM)
Bus wire or connector to module A damaged or loose
Body module A internally faulty

Symptoms

  • Keyless entry, liftgate or other body functions inoperative
  • Ignition cannot be switched on (Audi e-tron case)
  • MIL or several warning lamps on
  • Code stored in many modules at once

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,000
Time0.5–4 h

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

Parts involved

body control modulecan bus wiring

Related codes

U0140U0142U0143U0144U0145

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.