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 helps cool down the big battery in a hybrid or electric car. It's like a fan in a computer that isn't working right.
The P0ACF code indicates that the control circuit for the third cooling fan of the hybrid or electric vehicle's battery pack is open or not functioning properly.
The P0ACF code is triggered when the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) detects an open circuit or malfunction in the control circuit of the third cooling fan for the hybrid or electric vehicle's battery pack. This fan is crucial for maintaining the optimal temperature of the battery pack to ensure efficient operation and longevity.
• Check Engine Light is on
• Reduced battery performance
• Overheating of the battery pack
• Faulty cooling fan motor
• Damaged or corroded wiring/connectors
• Faulty control module
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
• Inspect the cooling fan and its wiring for damage.
• Check the connectors for corrosion or loose connections.
• Test the control module for proper operation.
• Replace the faulty cooling fan motor.
• Repair or replace damaged wiring or connectors.
• Replace the control module if necessary.
• Multimeter
• OBD-II scanner
• Screwdriver set
$200 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect cooling fan and wiring.
• Ensure battery pack cooling system is serviced as per schedule.
• Keep vehicle software updated.
Circuit Issue
• Avoid driving in extreme heat until repaired.
• Have the vehicle inspected by a professional.
• Monitor battery performance and temperature.
Check with the vehicle manufacturer for warranty coverage on hybrid/EV components.
This code has become more common with the increased use of hybrid and electric vehicles, highlighting the importance of battery cooling systems.
Moderate – It should be addressed soon to prevent battery damage.
Ignoring this issue could lead to reduced battery life or performance. Always follow safety guidelines when working with high-voltage systems.
• Vehicle at operating temperature
• Battery pack under load
The cooling fan is typically located near the battery pack, often in the rear of the vehicle.
Q: Can I drive with a P0ACF code?
A: It's not recommended to drive for long periods as it could lead to battery overheating.
Q: How do I reset the P0ACF code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is resolved first.
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