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 electric pump that helps cool down the electronics in a hybrid or electric vehicle. It's like if the fan in your computer stopped working and it got too hot.
The P2E43 code is triggered when the control circuit for the electronics coolant pump B is reading a voltage lower than expected, indicating a potential issue with the pump's operation.
The electronics coolant pump B is responsible for circulating coolant to manage the temperature of the hybrid/EV electronics. The control circuit monitors the voltage and current to ensure the pump operates correctly. A low reading suggests a possible open circuit, short to ground, or a faulty pump.
• Warning light on the dashboard
• Overheating of hybrid/EV electronics
• Reduced vehicle performance
• Possible limp mode activation
• Faulty electronics coolant pump B
• Open or shorted wiring in the control circuit
• Poor electrical connection at the pump
• Faulty control module
Hybrid/EV: Hybrid or Electric Vehicle
Coolant Pump: A device that circulates coolant to manage temperature
• Use a diagnostic scan tool to verify the code
• Inspect the wiring and connections for damage or corrosion
• Test the electronics coolant pump B for proper operation
• Check the control module for faults
• Repair or replace damaged wiring or connectors
• Replace the electronics coolant pump B if faulty
• Update or replace the control module if necessary
• OBD-II diagnostic scanner
• Multimeter
• Basic hand tools (screwdrivers, pliers)
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks
• Ensure cooling system is topped up and free of leaks
• Inspect wiring for wear and tear
Electrical Circuit Issue
• Do not ignore the warning light; address the issue promptly
• Consult with a professional mechanic for accurate diagnosis
• Avoid driving the vehicle if overheating occurs
Check with your vehicle manufacturer for specific warranty coverage on hybrid/EV components.
This code has become more common with the rise of hybrid and electric vehicles, as cooling systems for electronics are crucial for vehicle performance.
High – If not addressed, it can lead to overheating and potential damage to the vehicle's electronics.
Driving with a malfunctioning electronics cooling system can lead to vehicle performance issues and potential safety hazards.
• Vehicle in operation
• Electronics operating under load
The electronics coolant pump B is typically located near the hybrid/EV battery or power electronics module.
Q: Can I drive my car with this code?
A: It's not recommended, as it can cause the electronics to overheat and lead to further damage.
Q: How can I prevent this issue?
A: Regular maintenance and inspections of the cooling system can help prevent this issue.
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