Network, generic

U0144 Lost Communication With Body Control Module D

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0144 is logged by one or more control units that no longer receive the cyclic messages of the body controller J2012 calls Body Control Module D. In GM's network logic every node broadcasts a state-of-health message with ignition on; if it stays away while the supply is between 9 and 16 V, the listeners store a code naming the silent unit, not themselves. No manufacturer documents U0144 publicly: GM's U-code list knows only U0140, and Stellantis uses the neighbour U0145 for a BCM LIN bus. What the D unit does is maker-specific, typically a body sub-controller for doors, seats or lighting. U0140 to U0143 and U0145 cover the other body modules. Expect dead comfort functions, no MIL.

Likely causes

Fuse, power or ground of the body module D missing
Chafed bus wire or loose, wet connector on the way to module D
Weak battery or voltage dip, so the module drops off the bus (history code)
Body module D internally faulty or not programmed

Symptoms

  • Body functions handled by module D (locks, lighting, seats) do not respond
  • Scan tool cannot reach module D
  • Same code stored in several other modules

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–700
Time0.5–3 h

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

Parts involved

body control modulecan bus wiring

Related codes

U0140U0141U0142U0143U0145

References: saabwisonline.com, en.wikipedia.org, saabwisonline.com.