OBD-II code · Powertrain (generic)
P0C30 Hybrid/EV Battery Pack State of Charge High
The BMS detects that the HV battery pack state of charge exceeds the safe upper limit. Regenerative braking may be limited to prevent overcharge.
Is it safe to drive with P0C30?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySoC estimation drifted high
- PossibleRegen braking strategy off-target
- Less likelyPack cell imbalance approaching service threshold
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–4 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Hv Battery Pack, Bms
Related codes
- P0C2DElectric/Auxiliary Transmission Fluid Pump Control Module Feedback Signal Low
- P0C2EElectric/Auxiliary Transmission Fluid Pump Control Module Feedback Signal High
- P0C2FInternal Control Module Drive Motor/Generator - Engine Speed Sensor Performance
- P0C31Inverter B Cooling System Performance
- P0C32Hybrid/EV Battery Cooling System A Performance
- P0C33Hybrid/EV Battery Temperature Sensor F Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.