Network, generic

U0288 Lost Communication With DC/AC Converter Control Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

A DC/AC converter, usually called a power inverter, turns the vehicle's direct current into 120 V or 230 V alternating current for sockets in the cabin or the load bed. U0288 is logged when the module supervising those sockets stops receiving the cyclic frames of converter A. GM names the body control module as listener: preliminary information PIT6527 for the 2026 Colorado and Canyon reports U0288 appearing after BCM programming on trucks built without the KI6 outlet behind the centre console, where it affects nothing and may be ignored. On the 2021 F-150 with the 3.5 PowerBoost hybrid, Ford stores the code in secondary OBD module C, also called the inverter system controller, and cures it with new software (21-2128, index entry). Usually only the outlets go dead.

Likely causes

Body or gateway module configured for an outlet the vehicle does not have (false entry)
Outdated software in the converter or inverter system controller
Blown fuse, supply or bus wiring fault at converter A
Converter A internally failed

Symptoms

  • 120 V or 230 V outlets without power
  • Outlet or power supply warning in the instrument cluster
  • Code stored without any noticeable symptom

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–1,500
Time0.2–3 h

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

Parts involved

dc ac converter module avehicle bus wiring

Related codes

U0289U0589U058A

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