P0C30

Hybrid/EV Battery Pack State of Charge High

Moderate severity

The BMS detects that the HV battery pack state of charge exceeds the safe upper limit. Regenerative braking may be limited to prevent overcharge.

Common causes

SoC estimation drifted high
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $110-880
Regen braking strategy off-target
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $110-880
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does P0C30 mean?

P0C30 means "Hybrid/EV Battery Pack State of Charge High". It is a generic OBD-II code that points to a fault in the hybrid / ev powertrain.

What are the most common causes of P0C30?

soc estimation drifted high; regen braking strategy off-target; pack cell imbalance approaching service threshold — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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