P2CF4

Hybrid/EV Battery Pack Coolant Pump B Supply Voltage Circuit

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Hybrid/electric battery overheating
Reduced vehicle power
Dashboard warning
Increased noise from the pump

Causes

Cooling pump malfunction
Open or short circuit in wiring
Problems with the control unit
Low coolant level

How to Fix

Check coolant level
Diagnose the cooling pump
Check wiring integrity
Check control unit

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