U0144 code meaning
Lost Communication With Body Control Module D
What U0144 means
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.
U0144 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0144
- 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
Common causes of U0144
- Most likelyFuse, power or ground of the body module D missing
- PossibleChafed bus wire or loose, wet connector on the way to module D
- PossibleWeak battery or voltage dip, so the module drops off the bus (history code)
- Less likelyBody module D internally faulty or not programmed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Body control moduleCAN bus wiring
What each part of U0144 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 44 | The exact fault in that area. |
What to do next
- Note U0144 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0144
What does U0144 mean?
U0144 means "Lost Communication With Body Control Module D". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U0144?
U0144 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0144 fail an emissions test?
U0144 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0144 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U0144 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.