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Diagnose/P2903
P2903High SeverityHybrid/EV

Hybrid Battery Pack Fan Malfunction

What This Means

The hybrid battery cooling fan has malfunctioned. Without adequate cooling, the battery pack will overheat and trigger protective shutdown.

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.