P0C4D

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

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced performance of the hybrid system
Battery overheating
Noise or unusual sounds from the cooling pump
Reduced power or performance

Causes

Battery cooling pump malfunction
Problems with the electrical circuit (open, short circuit)
Faulty relay or fuse
Errors in the operation of the control system
Wiring harness damage

How to Fix

Check the voltage in the pump power circuit
Inspect the wiring harness for damage
Check the operation of the battery cooling pump
Replace faulty components (pump, relays, fuses)
Reset the error and check the system operation

Related codes

P0C4E P0C4F P0C50