Toyota
Hybrid battery temperature sensor 'A' reading out of range. The battery ECU uses it to run the battery cooling fan.
P0A9C fault code: what it means
P0A9C: Hybrid battery temperature sensor 'A' reading out of range. The battery ECU uses it to run the battery cooling fan.
Usual causes, most likely first
- faulty battery temperature sensor
- sensor wiring/connector fault
- battery ECU fault
P0A9C by make
What the repair usually costs
- Radiator cooling fan motor or fan assemblyNZ$350–NZ$1,280 · A$330–A$1,210
- Hybrid battery reconditioned exchange (Aqua / Prius C / Axio / Fielder)NZ$1,360–NZ$2,430 · A$1,390–A$2,370
- Hybrid battery reconditioned exchange (Prius 20 / 30 / Prius alpha / Prius V)NZ$1,640–NZ$2,790 · A$1,880–A$3,550
- Hybrid battery reconditioned exchange (Camry / Estima / Lexus / RAV4)NZ$2,140–NZ$4,150 · A$2,650–A$5,000
Not sure what P0A9C 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.