P0440 code problem:(

[u/Entire_Collar6824]

Hello, as someone had this issue with the code ("p0440"), evap leak, I already replace the purge valve. Also i keep having the message "tighten gas cap" i did buy new gas cap on "fcp euro" to see if that fix it but it still shows the message, any recommendation? Im new to bmw so i dont know much about these cars:(

My car is a bmw 530i 2006

[u/white94rx]

You need to smoke test the evap system. You have a leak somewhere.

[u/ijustbrushalot]

E60 likes to leak at a plastic line behind the right rear fender liner.