Check engine warning light caused by P0356 error:
There is a check engine light coming on the Toyota Sienna 2004 CE, so I wanna use the Autel AutoLink AL519 scan tool
to find out why it caused.
Plug the connector into OBD2 port,
to link vehicle with device.
Autel AL519 will automatically store data from diagnosis last time.
Read codes >> Stored codes
It tells there was a fault code P0356: Ignition coil F, primary/secondary circuit
So that is why caused check engine light.
Having known the reason, go back to clear codes.
Erase codes >> Yes >> Yes
Solution (what I did for reference)