Network, generic

U0275 Lost Communication With Lighting Driver Control Module C

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Driver module C is the third LED driver unit a lamp controller can address. Three or more of them appear where each headlamp has several separately driven zones, as on the 2025 Lincoln Navigator, whose release notes name LDCMC alongside A, B and D. U0275 means the controller no longer receives C's messages; the reason may be the bus, the supply or the module. Driver controllers such as TI's TPS92682-Q1 have a limp-home pin that, when raised, makes them run on a separate set of preset values, so a lamp section can keep working without network commands. Neither U0275 nor the lamp section behind letter C is described in any public service text. Expect a lighting warning and lost adaptive features.

Likely causes

Lamp harness or connector to module C damaged (e.g. after front-end repair)
Power or ground of module C interrupted
Module C internally faulty or overheated

Symptoms

  • Part of the headlamp light pattern missing or static
  • Warning for lighting system

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–1,200
Time0.3–3 h

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

Parts involved

lighting driver module cvehicle bus wiring

Related codes

U0576U0274U0276

References: static.nhtsa.gov, ti.com.