This code has been on for almost 3 months now and it started when i relocated the pcm. p0452 says EVAP emission control system pressure sensor low. the engine was replaced after light had already came on and when i got the car back the light was still on.
(advance auto suggested this)i started with the gas cap, checked and even replaced cap and reset pcm and wasnt it.
(chevy dealer suggested this)checked all vaccum lines on car and zex system and reset pcm and wasnt it.
(local mechanic suggested this)then changed the evap sensor and hose beside fuel tank, reset and wasnt it. any suggestions before i drive it over a cliff? probably just something simple i'm missing but its driving me crazy!

I have the same issue pop up today.

Did you check in the area of your charcol canister?




Cavalier z24......A poor man's Camaro....close enough, right?