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 car's computer has detected a problem with the electrical supply to the pump that helps keep the hybrid or electric vehicle's battery cool.
The vehicle's control module has detected that the supply voltage to the battery pack coolant pump is lower than expected.
The P0C4C code is triggered when the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) detects a low voltage condition in the supply circuit for the coolant pump A of the hybrid/EV battery pack. This can affect the cooling efficiency of the battery pack.
• Check Engine Light is on
• Overheating of the battery pack
• Reduced vehicle performance
• Faulty battery pack coolant pump
• Poor electrical connection in the pump circuit
• Blown fuse or faulty relay
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the electrical connections to the coolant pump.
• Check the fuse and relay associated with the coolant pump.
• Replace the battery pack coolant pump if faulty.
• Repair or replace damaged wiring or connectors.
• Replace blown fuses or faulty relays.
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect electrical connections.
• Ensure coolant levels are adequate.
• Schedule routine maintenance checks.
Electrical Circuit Issue
• Avoid driving the vehicle until the issue is resolved.
• Consult a professional mechanic for accurate diagnosis.
Check with the vehicle manufacturer for warranty coverage on hybrid/EV components.
This code has become more common with the increase in hybrid and electric vehicles, highlighting the importance of battery cooling systems.
High – This issue can lead to battery overheating and potential damage if not addressed promptly.
Driving with an overheating battery can be dangerous. It is recommended to address this issue immediately to avoid safety hazards.
• Vehicle is in a safe, stationary position.
• Battery pack is at normal operating temperature.
The coolant pump is typically located near the battery pack, often in the rear of the vehicle.
Q: Can I drive my car with this code?
A: It's not recommended to drive with this code as it can lead to battery overheating.
Q: How do I reset the check engine light after fixing the issue?
A: Use an OBD-II scanner to clear the code after repairs are completed.
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