P0A78
Drive Motor A Inverter Performance
P0A78 is an OBD-II diagnostic trouble code meaning: Drive Motor A Inverter Performance. Common causes: motor inverter fault, inverter cooling problems. Estimated repair cost: $167–556.
Symptoms
- Hybrid system power reduction
- Check Engine Light Illuminates
- The vehicle goes into emergency mode
- Unusual noises from the power plant
- Reduced performance of the hybrid system
Causes
- Motor inverter fault
- Inverter cooling problems
- Open or short circuit in the inverter circuits
- Damage to control electronics
- Problems with high voltage battery
How to Fix
- High Voltage System Diagnostics
- Checking the inverter cooling system
- Testing the inverter operation
- Checking the integrity of wiring harnesses
- Replacing a faulty inverter if necessary
Related codes
Error P0A78 by Vehicle Brand
FAQ
What does the P0A78 code mean?
P0A78 is an OBD-II diagnostic trouble code that indicates: Drive Motor A Inverter Performance
What causes a P0A78 error code?
The most common causes of P0A78 include: Motor inverter fault; Inverter cooling problems; Open or short circuit in the inverter circuits; Damage to control electronics.
How do I fix a P0A78 diagnostic trouble code?
To fix P0A78: High Voltage System Diagnostics. Checking the inverter cooling system. Testing the inverter operation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0A78?
Limited driving only, diagnose soon
How much does it cost to fix P0A78?
The estimated repair cost for P0A78 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat