P0C4C

Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit Low

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Reduced performance of the hybrid/electric system
Battery overheating
The malfunction indicator on the dashboard lights up
Reducing power or turning off the hybrid system

Causes

Poor contact in the pump power circuit
Broken or damaged wires
Cooling pump malfunction
Problems with the control unit
Low voltage in the on-board network

How to Fix

Check the voltage in the pump power circuit
Inspect and, if necessary, replace damaged wires
Check contacts and connections
Test the cooling pump
Check the operation of the control unit

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