P0A99

Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit Low

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Noise or lack of operation of the battery cooling fan
Error message on display
Elevated battery temperature

Causes

Open or short circuit in fan control circuit
Fan solenoid relay malfunction
Wiring Harness Problems
Malfunction of the hybrid system control unit
Mechanical failure of the cooling fan

How to Fix

Check fan circuit fuses
Diagnose the control circuit for breaks and short circuits
Check the operation of the fan
Test control relay
Check connections and connectors in the circuit
Repair only from an authorized dealer

Related codes

P0A98 P0A9A P0A80