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Q: Gas tank builds high pressure between fill ups and check engine light is on on 1999 GMC Safari

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
code P0440 evaporitive fule system do I have a blocked line a bad canister or a bad purge selonoid ?

can I fix or do I need a Mechanic?
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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P0440 is a general EVAP system code. There are many posibilities. I would recommend bringing it in for diagnostics to find out precisely where the fault is. We can smoke the system to check for leaks as well as other test to see if your solenoids are working properly.
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