P1448 2001 Nissan Altima Sedan -

Question

The neck fillet tank has been replaced.
All hoses have been checked.
The canister valve control has been replaced.
The cap has been replaced too.
The codes have been reset and after 40 miles the check engine light comes back on.
What steps should I take now?

Answer 1

Hi there,

It's possible the issue is with the evap pressure sensor. If it's not reading properly or the wiring is bad you will get this code. I would also suggest a smoke test. This will find the leak for you. Even the O ring on the gas tank can cause this code if the fuel pump has been replaced recently.