U058A code meaning
Invalid Data Received From DC/AC Converter Control Module B
What U058A means
U058A refers to a second DC/AC converter. Two converters can make sense when outlets in the cab and in the cargo bed are fed separately or when a high-power unit is added to a small one. GM's 2023 Silverado and Sierra 1500 illustrate how optional such hardware is: because of the chip shortage, trucks built from September 2022 left the factory with the inverter for the 120 V instrument panel and bed outlets inactive and later received an accessory power control module plus a body control module reprogram. Mismatched configuration after such a retrofit is a plausible source of invalid data. No manufacturer documents U058A or names a converter B publicly. U0289 is the lost-communication code. Only the outlets are affected.
U058A at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U058A
- One group of outlets dead while others work
- Outlet warning or service message
Common causes of U058A
- Most likelyConfiguration not updated after fitting or retrofitting converter B
- PossibleConverter B internally faulty or overheated
- Less likelyBus wiring to converter B damaged
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 b
What each part of U058A means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8A | The exact fault in that area. |
What to do next
- Note U058A 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 U058A
What does U058A mean?
U058A means "Invalid Data Received From DC/AC Converter Control Module B". U058A refers to a second DC/AC converter. It is a generic code, so it means the same on every make.
Is it safe to drive with U058A?
U058A does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U058A fail an emissions test?
U058A 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 U058A to fix?
Difficulty: medium. A typical repair takes 0.3 to 2.5 hours of work. This is a job for a workshop.
Will U058A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.