P0ACF

Hybrid/EV Battery Pack Cooling Fan 3 Control Circuit/Open

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Hybrid system power reduction
Increased noise from fans or their complete absence
Battery overheating messages on the instrument panel
Reduced performance of the hybrid system

Causes

Fan control circuit open
Fan solenoid relay malfunction
Wiring harness damage
Fan control unit malfunction
Connector problems or contact corrosion

How to Fix

Check fuses and fan relays
Inspect the wiring harness for damage
Check control circuit resistance
Test fan operation with direct connection
Replace the faulty fan or control unit if necessary

Related codes

P0ACD P0ACE P0AD0