i have P0456, and it's permanent now, it still stays even if it'shot outside(I live in miami,florida). it used to turn on only if it was acold weather. how can i check thelines to see if they're craked? i tryed to blow in them, but obd diagnostic tool says very small leak, so i guess that's not the best way to do it, cause i didin't find anything.

 

Need to get s smoke test done. About the only way to find a .020" hole or crack adding up to said size hole! Always try a new gas cap as a shot in the dark.

 

check the ends of the hoses as well, thats where my problem was.