Lexus
Drive motor 'A' inverter performance: the inverter section that drives the main traction motor (MG2) has reported a fault.
P0A78 fault code: what it means
P0A78: Drive motor 'A' inverter performance: the inverter section that drives the main traction motor (MG2) has reported a fault.
Usual causes, most likely first
- internal inverter (power module) failure
- inverter overheating from a cooling pump fault
- motor or HV cable fault
P0A78 by make
Toyota
Drive motor 'A' inverter performance: the inverter section that drives the main traction motor (MG2) has reported a fault.
What the repair usually costs
- EV drive motor bearing noise repair (unit out, bearings replaced)NZ$1,120–NZ$2,950 · A$1,200–A$3,090
- EV drive unit / motor replace (exchange or used)NZ$5,580–NZ$15,340 · A$6,120–A$16,200
Not sure what P0A78 means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.