Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the fan that helps cool down the battery in a hybrid or electric car is stuck and won't turn off.
The P0A98 code is triggered when the vehicle's control module detects that the second cooling fan for the hybrid or electric vehicle's battery pack is continuously running and cannot be turned off.
The hybrid or electric vehicle's battery pack requires cooling to maintain optimal performance and longevity. The cooling system typically involves one or more fans that help dissipate heat. The P0A98 code indicates that the second fan in this system is stuck in the 'on' position, which could be due to a malfunction in the fan itself, the fan relay, or the control module.
• Cooling fan running continuously
• Reduced battery performance
• Possible overheating of the battery pack
• Faulty cooling fan relay
• Malfunctioning cooling fan motor
• Wiring issues or short circuit in the fan circuit
Cooling Fan: A device that circulates air to cool down the battery pack.
Relay: An electrical switch that opens and closes under control of another electrical circuit.
• Check the cooling fan relay for proper operation.
• Inspect the wiring and connectors for damage or shorts.
• Test the cooling fan motor for functionality.
• Replace the faulty cooling fan relay.
• Repair or replace damaged wiring or connectors.
• Replace the cooling fan motor if defective.
• Multimeter
• Relay tester
• Basic hand tools
$150 - $400
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect the cooling fan system.
• Ensure proper maintenance of the battery cooling system.
• Check for software updates from the manufacturer.
Cooling System Issue
• Avoid driving the vehicle if the battery is overheating.
• Consult with a professional mechanic for diagnosis and repair.
Repairs may be covered under the vehicle's powertrain or emissions warranty. Check with the manufacturer or dealer.
This code has been more prevalent in older hybrid models where the cooling system components have aged or experienced wear.
Moderate – While the vehicle may still be operable, continuous operation with this fault can lead to battery overheating and potential damage.
Operating a vehicle with an overheated battery can be dangerous. Ensure repairs are conducted by a qualified technician.
• Vehicle is running or in a ready state.
• Ambient temperature conditions that require battery cooling.
The cooling fan is typically located near the battery pack, often in the rear of the vehicle or under the floor in electric vehicles.
Q: Can I drive my car with the P0A98 code?
A: It's not recommended to drive for extended periods with this code, as it could lead to battery overheating.
Q: How do I know if my cooling fan is stuck on?
A: You may hear the fan running continuously even when the vehicle is off, or notice reduced battery performance.
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