Powertrain
generic / SAE
P2D39
Forced Hybrid/EV Battery Disconnect
The BMS has forced a disconnect of the high-voltage battery from the vehicle bus. Triggered by safety condition such as overcurrent, isolation fault, or thermal runaway.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberD / 39
Possible causes
- Safety event triggered disconnect high
- Isolation fault detected medium
- Pack cell imbalance approaching service threshold low
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 500–5000 €
- Estimated time: 3–16 h
- Component: hv battery
- Component: main contactors
- Component: bms
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012