Reference meaning
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.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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.
Scan worksheet →Manufacturer communications
3Original wording in English
ACURA
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
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
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 Control Module.
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 |
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.