Was thinking maybe fuel pump or ignition sensor? If, as I read that there is possibly a coil going, which can apparently cause these sensors to fail, what are my options for the coils - are spares available for these cars ? TIA
If you have a dead coil I'd suggest the coil on plug kits people have made, makes it slightly more simple and gives you a cheaper option to replace coils in the future.
Naughtikas kit is great and is the OG but these days the yaris (denso) pencil coils are getting on in years.
The new go to is the audi/VAG group coils (R8 coils)
They clip onto the spark plug and dont require a mounting bracket (provided you slip an oring over the shank of them to support them from wobbling in the head)
And someone here makes a patch harness for them also.