what can cause Toyota hybrid Camry 2007 to stop using the hybrid battery even when the battery is still good
If the gasoline is getting old the engine will turn on to burn it before it goes bad. See owners manual.
Inverter failure is one possibility. Did you scan the ECUs for faults?
Camry hybrid isn’t a plug in, so it doesn’t do this. The engine is running most of the time.
Of course you are right. My error, thinking Prius.
Yes, for the Prius Prime (the plug-in).