I pulled the codes from my ZX3 2001 due to the check engine light. I pulled the detailed information showing that the BANK 1, how a low/to lean error. If I am correct, Bank one is pre air intake. My initial guess was the Ox sensor. Can anyone verify this diagnosis? Or shed some light as to some other places I should look. I have taken extensive time, looking at all my PVC and nothing seems to be off or split. I heard that this can be related to the fuel filter and beyond, yet I am hesitant because of the "bank1". Let me know if anyone can help out.