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 part that controls the cooling of the battery in a hybrid or electric vehicle. It's like if the fan in your computer stopped working properly and things started to get too hot.
The vehicle's control module has identified a low voltage condition in the circuit that controls the coolant control valve for the hybrid/EV battery pack.
The P0CE2 code is triggered when the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) detects a low voltage condition in the control circuit of the coolant control valve A. This valve is responsible for regulating the flow of coolant to the battery pack to maintain optimal operating temperatures.
• Check engine light is on
• Reduced battery performance
• Overheating of the battery pack
• Faulty coolant control valve
• Wiring issues such as short circuits or open circuits
• Malfunctioning control module
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage
• Test the coolant control valve for proper operation
• Repair or replace damaged wiring
• Replace the faulty coolant control valve
• Reprogram or replace the control module if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks
• Ensure proper coolant levels
• Inspect electrical connections periodically
Sensor Issue
• Do not ignore the check engine light
• Consult a professional mechanic if unsure
• Avoid driving the vehicle if overheating occurs
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 thermal management.
High – If not addressed, it can lead to battery damage or reduced vehicle performance.
Ignoring this code may lead to further damage and is not advisable for safety and legal reasons.
• Vehicle must be in a safe and stable condition
• Use proper safety equipment when inspecting electrical systems
The coolant control valve is typically located near the battery pack in hybrid and electric vehicles.
Q: Can I drive my car with a P0CE2 code?
A: It's not recommended to drive with this code as it can lead to battery overheating and potential damage.
Q: How do I reset the check engine light after fixing the problem?
A: Use an OBD-II scanner to clear the code after confirming the repair is successful.
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