Vapor canister

[poncherello]

My 05 Tahoe engine light won't go off after I got the tighten fuel cap message. I have since replaced the cap and reset the light. Still comes back on. Could this be a vapor canister issue? If so, is there a purge valve on it or should I just replace it? My ECM scan always shows the fuel cap issue.

 

[poncherello]

No one?

 

[dye4metal]

do you know what the code is? i was throwing a PO446 then a another for high tank pressure. i replaced so far the purge solenoid on the front intake manifold, gas cap, and tank pressure sensor. still got the check engine. im about to call it quits and take it somewhere

 

[poncherello]

do you know what the code is? i was throwing a PO446 then a another for high tank pressure. i replaced so far the purge solenoid on the front intake manifold, gas cap, and tank pressure sensor. still got the check engine. im about to call it quits and take it somewhere

My code is P0442