Toyota
Motor electronics (inverter) coolant temperature sensor range/performance. Hybrid ECU may limit power to protect the inverter.
P0A01 fault code: what it means
P0A01: Motor electronics (inverter) coolant temperature sensor range/performance. Hybrid ECU may limit power to protect the inverter.
Usual causes, most likely first
- inverter coolant temp sensor fault
- low inverter coolant or failed inverter pump
- sensor wiring fault
P0A01 by make
What the repair usually costs
- Parking sensor replace, one sensorNZ$130–NZ$520 · A$130–A$510
- Hybrid inverter coolant pump replace (Prius 20 series)NZ$310–NZ$680 · A$310–A$650
- Hybrid inverter coolant pump replace (Prius 30 / Aqua / Camry / Lexus)NZ$350–NZ$920 · A$360–A$930
- Hybrid inverter coolant drain, refill and bleedNZ$110–NZ$270 · A$120–A$280
Not sure what P0A01 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.