Toyota Repair: Flashing/blinking Check light, cylinder test, coil pack

Question
Thank you for your time
This is a follow up to the conversation below.
Its the third cylinder from the passenger's side.
Once again, thank you.


QUESTION: Thank you.
Yes its a 4cylinder engine.
Servicing was done about a week ago (Nov 29th)
I changed the engine oil and oil filter. Cleaned the air filter.
I havnt changed the plug since I bought the car over a year ago.
I noticed the misfire before the servicing but it seems to normalize when it warms up eventually.
Answer:While the engine is idling disconnect each coil lectrical connector starting from the left (passenger side) one at a time, the idle should drop when one cylinder is disabled, one of them may not affect the idle at all, this is the one that is misfiring, let me know which cylinder it is counting from the front of the engine.

Answer
Ok, remove the spark plug,this is cylinder #3, if it looks ok replace the coil pack, a common failure on thses engines, you can also switch The #3 coil with another one, let's say #1 which is the first one, then do the cylinder test again, if the misfire moves to #1 then the coil is bad. let me know what happens