Drive Motor Inverter Performance Issue
The P0A79 code indicates a performance problem with the drive motor inverter, which converts DC battery power to AC for the electric motor. This can cause reduced power, stalling, or failure to start. Common causes include inverter overheating, internal faults, or communication errors with the motor control module.
01. Most Common Causes
- Faulty inverter assembly
- Poor electrical connections or wiring issues
- Overheating due to cooling system failure
02. Symptoms You Will Notice
- Reduced motor power or acceleration
- Check engine light illuminated
- Vehicle may not start or move
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and check freeze frame data.
Step 2: Inspect inverter cooling system for leaks or blockages.
Step 3: Test inverter input/output voltages and resistance per service manual.
Step 4: Check wiring and connectors for damage or corrosion.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, driving with P0A79 can lead to sudden loss of power or complete failure, posing a safety risk. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
Repair costs typically range from $200 to $800, depending on whether the inverter needs replacement or just repairs to wiring/cooling.