OBD-II code · Powertrain (generic)
P0B34 High Voltage Service Disconnect Circuit Performance
The high-voltage service disconnect circuit reports a circuit performance condition. Safe HV disconnection state cannot be verified.
Is it safe to drive with P0B34?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySwitch contacts aged
- PossibleHigh-resistance contact
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
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.