The canister vent valve is different from the purge valve. The vent valve is located under the vehicle near the EVAP canister. It's going to require some good EVAP system troubleshooting to locate and repair the problem. The problem could be in the wiring, hoses, or canister itself.Could be an issue with the wiring harness preventing the purge valve from activating. Need a scan tool that can activate the valve.