I would pull the spark plugs and see if they have oil on them. If so, I would have to say that you have BLOW-BY. In other words the piston rings on your pistons or the cylinder walls are worn. When this happens oil can blow-by the piston rings into the combustion chamber. So as the exhaust opens up the oil is flowing through it and into your exhaust. This can be a very expense repair.
Sounds like a distributor or timing issue, a common issue
with these cars sometimes. Our Civic LX was giving us the same codes, We
replaced the distributor and reset the timing... problem resolved. Not sure
about the 2005 Civic year model, the ignition system may have changed with the
newer models...
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