P0354 2005 Toyota Prius -

Question

Do you have, or do you know how to get, a diagnostic chart on trouble code P0354 for a 2005 Toyota Prius?

Answer 1

if you have not replaced the spark plug do so and also the easy way to do it is swap the ignition coil with another cylinder and see if the code move to the other cylinder

you can swap 3 and 4 if you get code p0353 the ignition coil is bad.

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if that is not the problem, the wiring and computer need to be check 

see diagnostic procedures below