Hi, 

I've just done somes OBD2 scanning and find out that I need to replace:

The Vapor canister valve solenoid (due to error P145C and P0497 and a CHECK FUEL CAP message on dash) and

I do need to replace, if im not wrong, the Front Impact Sensor (due to error 41-11)

But, When a proceed to a scan, half the time, these codes appear all at once :

E4-11 : Front left side bag does not deployed by OPDS operation

E5-11 : Both or only one side curtain airbag, seat belt tensioner, and seat belt buckle tensioner does not deploy by vehicle speed 

F3-11 : The left side airbag deployed 

My main question: Is it correct to buy in a junkyard or a Kenny-U-Pull these first parts that I mentionned ? Or I really should buy them new?

My Second question: If you want to anwser it, Why does Half the time I see these random codes and what does it mean ? What the problem if they all appear at the same time ? 

This car as never been in an accident (my parents bought it new in 2011) and there is no lights on the dashboard. (Check Fuel cap is an animated message xD )

The airbag recall as been done on the car.

Honda Civic 2011 SE Sedan White 194 000km --> 120 547 mile

-Mickael S. From Montréal ; Studying Car Mechanic 

Thanks for your time, I appreciate it !