Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the fan that cools the battery in a hybrid or electric car. It's not working right, and the car's computer noticed it.
The P0AD2 code indicates that the control circuit for the third cooling fan of the hybrid or electric vehicle's battery pack is operating at a lower voltage than expected.
The P0AD2 code is triggered when the powertrain control module (PCM) or battery energy control module (BECM) detects a low voltage condition in the control circuit for the third cooling fan of the hybrid/EV battery pack. This fan is crucial for maintaining the optimal temperature of the battery pack, ensuring efficient operation and longevity.
• Illuminated check engine light
• Reduced fuel efficiency
• Overheating of the battery pack
• Faulty cooling fan 3
• Damaged or corroded wiring or connectors in the fan circuit
• Faulty control module
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the P0AD2 code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the cooling fan 3 for proper operation.
• Replace or repair damaged wiring or connectors.
• Replace the faulty cooling fan 3.
• Replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance and inspection of the cooling system.
• Ensure proper ventilation for the battery pack.
• Keep the vehicle's software updated.
Electrical Circuit Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional if you notice any symptoms.
• Regularly monitor battery performance.
Check with the vehicle manufacturer for specific warranty coverage on hybrid/EV components.
This code has become more common as hybrid and electric vehicles have increased in popularity, highlighting the importance of battery cooling systems.
Moderate – While the vehicle may still operate, ignoring this issue can lead to battery damage or reduced efficiency.
Driving with a malfunctioning battery cooling system can lead to overheating and potential safety hazards. Address the issue promptly.
• Vehicle is running and at operating temperature.
• Battery cooling system is active.
The cooling fan 3 is typically located near the hybrid/EV battery pack, often in the rear of the vehicle.
Q: Can I drive my car with a P0AD2 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to battery overheating.
Q: How do I reset the P0AD2 code?
A: After repairs, use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes to reset the system.
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