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 thinks the sensor that checks how hot or cold the coolant is for the electric motor is showing a temperature that's too high.
The P0CBF code is triggered when the vehicle's powertrain control module (PCM) detects a high voltage signal from the drive motor A coolant temperature sensor circuit, indicating a temperature reading higher than expected.
The drive motor A coolant temperature sensor monitors the temperature of the coolant used to cool the electric motor. If the sensor sends a signal that indicates a temperature higher than the normal operating range, the PCM sets the P0CBF code. This could be due to a malfunctioning sensor, wiring issues, or an actual overheating condition.
• Check Engine Light illuminated
• Reduced vehicle performance
• Possible overheating warning on dashboard
• Faulty drive motor A coolant temperature sensor
• Wiring issues such as shorts or open circuits
• Actual overheating of the drive motor coolant
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the coolant temperature sensor.
• Test the sensor for proper operation using a multimeter.
• Replace the drive motor A coolant temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Ensure the coolant system is functioning properly and not overheating.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $300
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regularly check and maintain coolant levels.
• Inspect electrical connections for corrosion or damage.
• Ensure the cooling system is serviced as per the manufacturer's schedule.
Sensor Issue
• Do not ignore the Check Engine Light; have the vehicle inspected.
• Avoid driving the vehicle if it shows signs of overheating.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has been associated with hybrid and electric vehicles that utilize electric drive motors requiring cooling systems.
Moderate – It is important to address this issue to prevent potential overheating and damage to the electric motor.
Driving with a malfunctioning coolant temperature sensor may lead to overheating, which can cause damage to the vehicle and pose safety risks.
• Engine running
• Vehicle at operating temperature
The drive motor A coolant temperature sensor is typically located near the electric motor or integrated into the cooling system of the vehicle.
Q: Can I drive with a P0CBF code?
A: It's not recommended to drive with this code as it may lead to overheating and damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance of the cooling system and checking sensor connections can help prevent this code.
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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.