What Does P0A96 Mean?
DTC P0A96 indicates an open circuit or general malfunction in the control circuit for hybrid battery pack cooling fan 2. Vehicles with larger battery packs often use multiple cooling fans for adequate thermal management. Fan 2 serves a different zone or supplements fan 1, and its failure leaves part of the battery pack without active cooling. This code mirrors P0A81 but applies to the second fan circuit.
Safety Warning
Without the secondary cooling fan, part of the battery pack may overheat during sustained driving, especially under load or in warm ambient conditions. The BMS may derate power to protect the pack, reducing vehicle performance. Prolonged operation without repair risks permanent battery damage.
Common Causes
30%
Corroded, loose, or disconnected wiring connector at cooling fan 2 motor
25%
Blown fuse or fusible link in the cooling fan 2 power supply circuit
20%
Failed cooling fan 2 motor (open winding)
15%
Faulty fan 2 control relay or driver circuit in the battery management module
10%
Damaged or chafed wiring harness between the BMS and fan 2 motor
Diagnostic Steps
1
Check the fuse and relay for the battery cooling fan 2 circuit — replace if blown and retest.
2
Inspect the cooling fan 2 motor connector for corrosion, bent pins, or loose terminal fit; clean and reseat the connector.
3
Using a multimeter, perform a continuity check on the wiring harness from the BMS to the fan 2 motor connector.
4
Apply direct battery voltage to the fan 2 motor terminals to verify the motor itself is operational.
5
If wiring and fan are good, check for voltage output from the BMS fan 2 control driver — lack of output indicates a control module issue.
6
Verify fan 1 is operating correctly — if both fans are down, the root cause may be shared power or ground connections.
Estimated Repair Cost
$100 - $800
Parts + labor, varies by vehicle and location
DTC P0A96 indicates an open circuit or general malfunction in the control circuit for hybrid battery pack cooling fan 2. Vehicles with larger battery packs often use multiple cooling fans for adequate thermal management. Fan 2 serves a different zone or supplements fan 1, and its failure leaves part...
The most common cause of P0A96 (Hybrid Battery Pack Cooling Fan 2 Control Circuit/Open) is: Corroded, loose, or disconnected wiring connector at cooling fan 2 motor
Typical repair costs for P0A96 range from $100 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Without the secondary cooling fan, part of the battery pack may overheat during sustained driving, especially under load or in warm ambient conditions. The BMS may derate power to protect the pack, reducing vehicle performance. Prolonged operation without repair risks permanent battery damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0A96 to identify the root cause.
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Quick Info
Category
Powertrain
System
Hybrid Battery Thermal Management
Difficulty
Type
Generic (SAE)
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