U0288 code meaning
Lost Communication With DC/AC Converter Control Module A
What U0288 means
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.
U0288 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.2 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0288
- 120 V or 230 V outlets without power
- Outlet or power supply warning in the instrument cluster
- Code stored without any noticeable symptom
Common causes of U0288
- Most likelyBody or gateway module configured for an outlet the vehicle does not have (false entry)
- PossibleOutdated software in the converter or inverter system controller
- PossibleBlown fuse, supply or bus wiring fault at converter A
- Less likelyConverter A internally failed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Dc ac converter module aVehicle bus wiring
What each part of U0288 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 88 | The exact fault in that area. |
What to do next
- Note U0288 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 U0288
What does U0288 mean?
U0288 means "Lost Communication With DC/AC Converter Control Module A". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U0288?
U0288 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0288 fail an emissions test?
U0288 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 U0288 to fix?
Difficulty: medium. A typical repair takes 0.2 to 3 hours of work. This is a job for a workshop.
Will U0288 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.