OBD-II code · Powertrain (generic, extended)

P2DBB Battery Charging System B High Voltage Interlock Circuit Intermittent/Erratic

The high-voltage interlock circuit of battery charging system B reports a circuit intermittent/erratic condition. Safety interlock chain may be compromised.

Is it safe to drive with P2DBB?

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 with intermittent contact under vibration

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

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.