P2DB7Battery Charging System B High Voltage Interlock Circuit/Open
- Generic OBD-II code · Powertrain
- How the car detects it
- P2DB7 reports that the high voltage interlock loop of charging system B is broken. Such a loop is a low-current wire run in series through the HV plugs and covers of a charging path; once it opens, the control unit treats the path as unsafe and keeps it switched off. B denotes a second charging path, for example a further on-board charger. No manufacturer documents P2DB7 publicly. The A-side code P0D15 shows a typical cause: on 2021–2023 XC40 Recharge cars Volvo found that the plant had not closed the latches on the AC high-voltage plug linking inlet and charger (TJ 36522, P0D1513), and AC charging was lost; seating and latching the plug fixed it. CARB wants plug-in hybrids to detect faults that disable charging. Signal-level faults of this loop are P2DB8 to P2DBB.
- What you may notice
- No charging through charging path B
- Charging system warning in the instrument cluster
- Likely causes
- LikelyHV connector in the charging path not fully seated or its catch not closed
- PossibleBroken interlock wire or pushed-out terminal
- PossibleService cover or HV cover of the charger not closed properly
- RareFault in the interlock evaluation of the control module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.