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 a part of the electric motor in your car is getting too hot. It's like when you play a video game for too long and the game console gets really warm.
The P0C16 code indicates that the temperature of the W phase in the inverter of Drive Motor B is higher than the specified limit.
The inverter is a component in hybrid and electric vehicles that converts DC power from the battery into AC power for the electric motor. The inverter has multiple phases (U, V, W) to control the motor. If the temperature sensor detects that the W phase is overheating, it triggers the P0C16 code.
• Warning light on the dashboard
• Reduced vehicle performance
• Overheating of the electric motor
• Faulty temperature sensor
• Cooling system malfunction
• Excessive load on the motor
Inverter: A device that converts DC to AC power.
Phase: A stage in the cycle of the electrical current.
• Check for any other related error codes.
• Inspect the cooling system for leaks or blockages.
• Test the temperature sensor for proper operation.
• Replace the faulty temperature sensor.
• Repair or replace any damaged cooling system components.
• Ensure proper load distribution on the motor.
• OBD-II scanner
• Multimeter
• Coolant system pressure tester
$200 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance of the cooling system.
• Avoid overloading the vehicle.
• Monitor vehicle temperature gauges regularly.
Temperature Sensor Issue
• Do not ignore the warning light; get your vehicle checked.
• Avoid driving long distances until the issue is resolved.
Check your vehicle's warranty for coverage on hybrid system components.
This code has become more common with the increasing use of hybrid and electric vehicles.
High – Overheating can lead to significant damage if not addressed promptly.
Driving with an overheating motor can be dangerous and may lead to vehicle failure.
• Vehicle must be in operation.
• Temperature must be monitored under load.
The inverter is typically located near the electric motor, often under the hood or beneath the vehicle.
Q: Can I drive with a P0C16 code?
A: It's not recommended as it may cause further damage to the motor.
Q: How can I prevent this code from appearing?
A: Regular maintenance of the cooling system and avoiding excessive loads can help prevent overheating.
Budget · Enhanced code reader
A wired color-screen reader with readiness hotkeys, live data, code definitions, and data logging.
A dependable first-pass scanner for verifying the code and checking live data or readiness monitors.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for voltage, continuity, and basic electrical checks while narrowing down the fault.
View on Amazon
Universal · Socket set
A practical metric and SAE socket set for many diagnostic teardowns and component replacements.
Useful for common under-hood access and removal work during diagnosis or repair.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.