Error code P0456 - Evaporative Emissions System Leak Detected (Very Small Leak)
Well, guys, it happened. My first check engine light in almost 45,000 miles of driving my Mustang. Had Autozone read the code and it turned out to be P0456, which is apparently a notoriously rare code that many OEMs don’t even use. Autozone suggested that I replace the EVAP canister, but I’ve read online that it could be a leak literally anywhere in the EVAP system and even a Ford dealership would have a hard time nailing down the actual problem. And even fixing the leak wouldn’t fix whatever caused the leak, so fuck me. If anyone has any experience with EVAP issues, lemme know!