OBD-II code · Powertrain (generic, extended)
P2D9F High Voltage System Voltage High
The high-voltage system voltage is above the expected window. Regenerative braking overshoot or BMS regulation fault.
Is it safe to drive with P2D9F?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyHV battery cells aged
- PossibleBMS regulation outside calibration
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 3–16 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery, Bms, Hv Bus
Related codes
- P2D9CStarter/Generator Phase V Current Circuit Intermittent/Erratic
- P2D9DStarter/Generator Phase W Current Circuit Intermittent/Erratic
- P2D9EHigh Voltage System Voltage Low
- P2DA0High Voltage System Voltage Performance
- P2DA1Gear Shift Control Module B Supply Voltage Low
- P2DA2Gear Shift Control Module B Supply Voltage High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.