The evap control valve is on the cannister
0442 evap emission control system malfunction(small leak detected) 0443 evap emission control system purge control valve circuit malfunction 0450 evap emission control system pressure sensor malfunction 0455 evap emission control system malfunction(gross leak detected) there ya go
Where is the evap purge control valve located on a 96 camaro
p1446
The Evap canister (charcoal canister ) collects fuel vapour until it is drawn into the intake system when the evap solenoid is operated by the ECU
The evap purge solenoid is located on the top of the engine. The evap vent solenoid is located in the rear drivers side wheel well, attached to the charcoal canister.
P1148
P0443 - EVAP control system CANISTER PURGE VALVE CIRCUIT MALFUNCTION - VPWR circuit open - Evap canister purge valve circuit shorted to ground - damaged EVAP canister purge valve - EVAP canister purge valve circuit open - EVAP canister purge valve circuit shorted to VPWR - damaged PCM
Trouble code P0449 means: EVAP Vent Solenoid Control Circuit Malfunction
Most likely it means your gas cap is loose... or whats called an evap system leak.
Rockauto.com has the part for $55
EVAP Emission Control System Vent Circuit Malfunction.