P0B37
High Voltage Service Disconnect Open
The high-voltage service disconnect circuit reports a open condition. Safe HV disconnection state cannot be verified.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Service disconnect switch in service positionCommon
- Open in disconnect wirePossible
Parts involved
- Hv Service Disconnect Switch
- Wiring Harness
- Bms
P0B37 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.