P2901Critical SeverityHybrid/EV

Hybrid Battery Pack Voltage Too Low

What This Means

The hybrid battery pack voltage has dropped below the minimum safe threshold. The battery may be deeply discharged or have failing cells.

Common Symptoms

Hybrid system warning light
Reduced EV range
Power limitation
Check engine light on

Common Causes

Battery cell degradation
Inverter failure
Motor winding damage
Cooling system issue
High-voltage wiring fault

Estimated Repair Cost

$500 – $5000

Parts and labor (varies by vehicle and location)

Difficulty:Professional

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.