Drive Motor Inverter Phase V Over Temperature
The P0C15 code indicates that the temperature sensor for Phase V of the drive motor inverter has detected excessive heat. This inverter converts DC battery power to AC for the electric motor, and overheating can be caused by high current draw, cooling system failure, or a faulty sensor. Prolonged operation may damage the inverter or motor.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced motor power or limp mode
- Overheating warning on dashboard
- Poor acceleration or performance
2. Most Common Causes
- Coolant pump failure or low coolant level
- Faulty inverter temperature sensor
- High motor load or extended heavy acceleration
- Blocked or leaking cooling system
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and check freeze frame data.
Step 2: Inspect coolant level and condition; check for leaks.
Step 3: Test coolant pump operation and verify flow.
Step 4: Measure inverter temperature sensor resistance and compare to specs.
Step 5: Check for debris or blockages in cooling passages.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, driving with an overheating inverter can cause permanent damage. Pull over and allow the system to cool. Have the vehicle towed to a shop.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. Repairs vary: coolant pump replacement $200-$500, sensor replacement $100-$300, or inverter replacement $1,000-$3,000.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.