Can’t seem to find the cause of these codes. Had the fuel tank (which I had replaced) and evap system smoke tested. No leaks. Replaced both control valves/ solenoids in purge system. Replaced vacuum pressure canister and pressure sensor. Vacuum tested line to carburetor. It held. What have I missed? P.S. Just completed a road trip of 4300 miles with no problems and got approximately 42 mpg. Should I be concerned?
No. They are standard OBDII codes. 0441 is “incorrect purge system flow”. The other indicates a large leak in the outrage system.
They are actually P0441 and P0445, which is why bisco is asking, because without the letter (which indicates the system), they look odd. Diagnosis of these two codes is pretty involved, and I suggest taking a 2 day subscription at Technical Information System (TIS) and reading up on them.
