P0302 P0303 and P0305 faulty code

[youry]

My head is already spinning after reading tons of threads about these codes. Cylinders 2, 3 and 5 misfire.
Some people say it could be the spark plugs and the ignition coils. Hard to believe they could fail the same time.
Some other people say it could be the O2 sensors. Others the cables.
I will start switching the ignition coils between cylinders. If I get the misfire on the same 2, 3 and 5 then I can rule out the coils.
Before I start spending thousands does anyone have a clear idea of what should I look into first?
thanks









Problem solved
I had to add some engine oil and forgot to put the oil filling cap back.






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