P2E79

Hybrid/EV Electronics Coolant Pump C Performance

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$167–444 (est.)

Symptoms

Overheat warning on dashboard
Hybrid system power reduction
Noise or hum from the cooling pump
Overheating of electronic components
Activation of emergency operation

Causes

Cooling pump malfunction
Problems with wiring or connectors
Low coolant level
Air locks in the cooling system
Pump control unit malfunction

How to Fix

Check the level and condition of the coolant
Eliminate air locks in the system
Check the integrity of wiring and connectors
Test the operation of the pump and its control circuit
If necessary, replace the cooling pump

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