P0BC0

Hybrid/EV Battery Pack Cooling Fan Supply Voltage Circuit Low

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Hybrid system power reduction
Battery overheat warning on dashboard
Noisy cooling fan
Extended charging time
Reduced electric vehicle range

Causes

Problems with fan wiring or connectors
Fan circuit relay or fuse failure
Wiring harness damage
Battery control unit malfunction
Problems with the cooling fan itself

How to Fix

Check fan circuit fuses and relays
Inspect connectors and wiring for damage
Check the voltage at the fan terminals
Test the fan operation directly
If necessary, replace the cooling fan

Related codes

P0BC1 P0BC2 P0AFA