Isuzu Hombre pickup (same as Chevy S10...

Isuzu Hombre pickup (same as Chevy S10), 2.2L Vortec, Won't Start. I have an Isuzu Hombre pickup, 2.2L Vortec engine. It just suddenly stopped running. Here's what I checked: ignition module (good), ignition coils (good), fuel pump (good), fuel filter (new/good), fuel pressure to fuel rail 39 psi (good), battery (good), spark plugs have good spark (good), I hooked up code reader and it detected one code: (PO452 emission control system pressure sensor low). This code can't be the problem with my truck because I knew it already had this problem, I got this code over four years ago and I just drove it like that. No new codes detected whatsoever. Have any idea's? Please help.