2007 Saturn Ion 2.2L with engine codes P0440 and P0442 pending / confirmed

Question

cannot locate logic tree [ x mechanic ] repl/both canister both internal solenoids + front purge valve . believe i have an overpressure / not purging condition on inspection . need 'supporting' logic tree to diagnose .. have no outward damage believe this is a controll prob ..

Answer 1

P0440 and P0442 is mostly caused by the fuel tank pressure sensor. Replace the sensor this should resolve the situation

Answer 2

P0440 Saturn Code - Evaporative Emission System
Read more: https://www.autocodes.com/p0440_saturn.html

P0442 Saturn Code - Evaporative Emission System Small Leak Detected
Read more: https://www.autocodes.com/p0442_saturn.html