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 there's a problem with a part in your car that helps control the flow of coolant, which is a liquid that keeps the engine from getting too hot. It's like a valve that isn't working right because it's not getting enough power.
The P0E7C code indicates that the control circuit for the Coolant Bypass Valve B is experiencing low voltage, which means it might not be functioning properly.
The Coolant Bypass Valve B is responsible for regulating the flow of coolant in the engine to ensure optimal operating temperatures. A 'Control Circuit Low' code suggests that the electrical circuit controlling this valve is not receiving adequate voltage, potentially due to wiring issues, a faulty valve, or a problem with the control module.
• Check Engine Light is on
• Engine overheating
• Poor engine performance
• Faulty Coolant Bypass Valve B
• Damaged or corroded wiring/connectors
• Faulty Engine Control Module (ECM)
Coolant: A liquid that absorbs heat from the engine to prevent overheating.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the Coolant Bypass Valve B for proper operation.
• Replace the Coolant Bypass Valve B if faulty.
• Repair or replace any damaged wiring/connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Ford Fusion Hybrid
• Regularly inspect and maintain the cooling system.
• Ensure electrical connections are clean and secure.
• Follow the manufacturer's maintenance schedule.
Sensor Issue
• Do not ignore the Check Engine Light; get it diagnosed promptly.
• Avoid driving the vehicle if it's overheating.
• Consult a professional mechanic if unsure about the repair.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has been more common in hybrid and electric vehicles due to their complex cooling systems.
Moderate – Addressing this issue promptly can prevent engine overheating.
Ignoring this code can lead to engine damage and potential safety hazards.
• Engine must be at operating temperature.
• Vehicle should be in a safe location for testing.
The Coolant Bypass Valve B is typically located near the engine block or within the engine bay, connected to the cooling system.
Q: Can I drive with a P0E7C code?
A: It's not recommended to drive with this code active, as it can lead to engine overheating and potential damage.
Q: How can I prevent this code from occurring?
A: Regular maintenance of the cooling system and ensuring all electrical connections are secure can help prevent this issue.
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