OBD-II code · Powertrain (generic)
P0B37 High Voltage Service Disconnect Open
The high-voltage service disconnect circuit reports a open condition. Safe HV disconnection state cannot be verified.
Is it safe to drive with P0B37?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyService disconnect switch in service position
- PossibleOpen in disconnect wire
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Service Disconnect Switch, Wiring Harness, Bms
Related codes
- P0B34High Voltage Service Disconnect Circuit Performance
- P0B35High Voltage Service Disconnect Circuit Low
- P0B36High Voltage Service Disconnect Circuit High
- P0B38Motor Electronics Coolant Pump B Control Circuit/Open
- P0B39Motor Electronics Coolant Pump B Control Circuit Low
- P0B3AMotor Electronics Coolant Pump B Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.