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Sure thing, if you do find a broken or loose line, repair it as needed then disconnect your battery for about 10-15 min, that will reset your codes if you dont have a scanner to do it.
I checked all the lines and cant find anything loose or disconnected, I have replaced the gas cap with a new one, the PO455 code shows it might be a defective purge or vent solenoid , could you please advise as where this might be located ? thanks again for your assistance.