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2025 FORD F-150
3.5L V6 PowerBoost Hybrid•4WD•AUTOMATIC•hybrid•turbo
12 active safety recalls on this vehicle — view recalls
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Repairs0Labor505Torque148Fluid10DTC1896Battery1Maintenance0Recalls12
P3204high severityPowertrain

HV Battery Cooling System Flow Rate Low

on 2025 Ford F-150 3.5L V6 PowerBoost Hybrid · 4WD

What this code means

The HV battery cooling system is not providing adequate coolant flow to maintain optimal battery temperature.

Symptoms

  • Battery temperature warning
  • Reduced charge/discharge rate
  • Power output limited
  • Fan running at maximum speed
  • Reduced electric range in hot weather
  • Charging speed reduced

Common causes

  • Coolant pump failure
  • Clogged cooling lines
  • Low coolant level in battery circuit
  • Air in cooling system
  • Thermostat stuck closed

Diagnostic steps

  1. Check battery coolant level
  2. Monitor battery temperatures across modules
  3. Test coolant pump operation
  4. Inspect cooling lines for kinks or blockage
  5. Bleed air from battery cooling circuit

Repair notes

Replace coolant pump if failed. Flush and refill battery cooling circuit with specified coolant. Repair any leaks.

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