my 2004 mazda tribute was CEL code P0453. there is not specific part for that code. definition is evap pressure. anyone know what part should i replace it? anyway car run and drive fine. the only thing it wont pass inspections without repair.

The fuel tank pressure sensor and wiring harness should be inspected and tested. Also, there may be blockages in the EVAP purge line (which goes to the purge valve), or even a bad purge valve. You can throw lots of time and funds at this before tracking it down, so I advise having it diagnosed professionally.