Drive Motor Inverter Power Supply Circuit Open
The P0C0E code indicates an open circuit in the power supply to the drive motor inverter. This inverter converts DC battery power to AC for the electric drive motor. An open circuit means the electrical path is broken, preventing the inverter from receiving power. This can cause the vehicle to lose propulsion or fail to start.
01. Most Common Causes
- Blown fuse or fusible link in the inverter power supply circuit
- Damaged wiring or connector between the battery and inverter
- Faulty inverter assembly
- Corroded or loose terminals at the inverter or battery
02. Symptoms You Will Notice
- Vehicle may not start or move
- Reduced or no power from the electric motor
- Check Engine Light or warning light on dashboard
- Possible loss of regenerative braking
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the P0C0E code and check for related codes.
Step 2: Visually inspect the inverter power supply fuse and replace if blown.
Step 3: Check voltage at the inverter power input connector; if no voltage, trace wiring back to battery for opens or shorts.
Step 4: Inspect connectors for corrosion, damage, or loose pins; clean or replace as needed.
Step 5: If power is present at the connector but inverter does not operate, test the inverter per manufacturer procedures or replace it.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The vehicle may lose propulsion unexpectedly, increasing the risk of an accident. Have it towed to a repair shop.
How much does it cost to fix?▼
Costs vary from $200 to $800 depending on the cause. A blown fuse is cheap, but replacing an inverter can be expensive.