What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
3Original wording in English
ACURA
Reported code forms B2BAA
Service Bulletin - An intermittent loss of heating or cooling in the cabin and may display a "Service High Voltage" message and DTC B2BAA due to a software issue.
HONDA
Reported code forms B2BAA
Service Bulletin - Due to software issue, customers may experience intermittent loss of heating or cooling in the cabin and may display a "Service High Voltage" message and DTC B2BAA.
CADILLAC, CHEVROLET, GMC
Reported code forms B2BAA
This Preliminary information communicates that a vehicle may come to the dealer with a service high voltage message. The dealer is instructed to check for code B2BAA and if it is found to reprogram the Battery Energy…
Check vehicle applicability
14A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Acura | ZDX | 2024 |
| Cadillac | LYRIQ | 2025 |
| Cadillac | LYRIQ | 2024 |
| Chevrolet | BLAZER EV | 2025 |
| Chevrolet | BLAZER EV | 2024 |
| Chevrolet | EQUINOX EV | 2025 |
| Chevrolet | EQUINOX EV | 2024 |
| Chevrolet | SILVERADO EV | 2025 |
| Chevrolet | SILVERADO EV | 2024 |
| GMC | HUMMER EV PICKUP | 2025 |
| GMC | HUMMER EV PICKUP | 2024 |
| GMC | SIERRA EV | 2025 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.