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 sensor that checks the temperature of the liquid that keeps the hybrid or electric car's battery cool. It's like a thermometer for the battery, and it's not working right.
The P0C43 code is triggered when the vehicle's control module detects a problem with the range or performance of the battery pack coolant temperature sensor circuit.
This code indicates that the sensor responsible for monitoring the temperature of the coolant in the hybrid or electric vehicle's battery pack is reporting values that are outside the expected range. This could be due to a faulty sensor, wiring issues, or problems with the control module.
• Check Engine Light illuminated
• Possible overheating of the battery pack
• Reduced vehicle performance or efficiency
• Faulty battery pack coolant temperature sensor
• Wiring issues or poor electrical connections in the sensor circuit
• Faulty control module
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics and reporting in vehicles.
Coolant: A liquid used in vehicles to transfer heat away from the engine or battery pack.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors of the battery pack coolant temperature sensor for damage or corrosion.
• Test the sensor's resistance and compare it to the manufacturer's specifications.
• Replace the battery pack coolant temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Update or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance and inspection of the coolant system.
• Ensure proper coolant levels and quality.
• Check electrical connections periodically.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you notice any performance issues.
• Regularly check and maintain coolant levels.
Repairs may be covered under the vehicle's powertrain or emissions warranty.
This code has been more prevalent with the increase in hybrid and electric vehicles, highlighting the importance of battery temperature management.
Moderate – While the vehicle may still operate, ignoring this issue could lead to battery damage or reduced performance.
Driving with an unresolved issue related to the battery cooling system may lead to safety risks and potential legal issues if the vehicle fails emissions tests.
• Engine running
• Battery pack at operating temperature
The battery pack coolant temperature sensor is typically located near the battery pack, often integrated into the coolant system.
Q: Can I drive with a P0C43 code?
A: It's not recommended to drive for extended periods with this code as it may lead to battery overheating and damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance of the coolant system and ensuring all sensors and connections are in good condition can help prevent this issue.
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Universal · Digital multimeter
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
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Fitment Required · Vehicle-fitment part
Relevant when coolant-temperature and warm-up faults indicate a thermostat-related issue.
Coolant-temperature and warm-up faults often lead to thermostat testing and replacement.
Thermostats are vehicle-specific and should be matched by engine and housing style.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.