Car will start but not run with a P0446 OBD code.

Hello, yes, this code is for evaporative emissions systems issues. Don't forget that an engine performance concern may be present without a related code. Hands-on testing of fuel, ignition, air intake, exhaust, emissions control components is needed. That's the only way to figure out what's going on with your vehicle causing it to not run. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops