I continue to have problem with the fuel sensor ( all replaced now) . Now the on 2007 Nissan Murano

check engine light is on again and the dealer says it is a fuel overflow valve that is stuck shut? $700 repair
is this related to fuel sensor issues ?

Asked by for the 2007 Nissan Murano
You say "all" the fuel sensors have been replaced, do you mean the Oxygen sensors (as there are several of these on a V6 engine)? The valve you are told is defective is not related to the Oxygen sensor repairs or would not have caused the present failure.