Autel AL519 Solved Toyota Sienna 2004 CE P0356 Error

Problem

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 the OBD2 port,

Press “OBDII/EOBD” to link the vehicle with the device.

Autel AL519 will automatically store data from the diagnosis last time.

Press “Yes” to erase.

Read codes >> Stored codes

AL519 tells there was a “fault code P0356: Ignition coil F, primary/secondary circuit.”

So that is why caused a check engine light.

Having known the reason, go back to clear codes.

Erase codes >> Yes >> Yes

Erase done!

Solution (what I did for reference)

Remove either the battery terminal positive or negative;
Remove the spark plug 6, you can Google where it is;
Check the connection of coil, make sure it was not cut;
Using brake cleaner to clean spark plug, because dirty smoke won’t make it work well;
Put everything back to the original position.

Turn the ignition on, the check engine light has gone!

The problem was solved!

Thanks to Autel AL519, I finally found out & solve fault code P0356 for Toyota Sienna, the annoying warning light no more came back again.