OBD-II code · Powertrain (generic, extended)
P2DB9 Battery Charging System B High Voltage Interlock Circuit Low
The high-voltage interlock circuit of battery charging system B reports a circuit low condition. Safety interlock chain may be compromised.
Is it safe to drive with P2DB9?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyInterlock signal interrupted
- PossibleInterlock connector not seated
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Bcs B Hv Interlock, Wiring Harness, Bms
Related codes
- P2DB6Battery Charger B Cooling System Performance
- P2DB7Battery Charging System B High Voltage Interlock Circuit/Open
- P2DB8Battery Charging System B High Voltage Interlock Circuit Performance
- P2DBABattery Charging System B High Voltage Interlock Circuit High
- P2DBBBattery Charging System B High Voltage Interlock Circuit Intermittent/Erratic
- P2DBCBattery Charger B Coupler Lock Position Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.