I own a 2006 grand vitara. Recently, it started exhausting what smells to be like gas fumes. For context, the check engine light originally came on, and I plugged my OBDII reader in. It gave the code of P0456 (which is a evaporative emission system leak detected (very small leak)), and to attempt a fix at it, I replaced the gas cap, and it seemed to go away (this was verified by the dealership that I took it to for service). Fast forward a little while later, and the smell came back again, and it seems to be coming through my HVAC system, and outside as well. Seems like there is an exhaust leak somewhere, and Im not sure where. What should I do? The car has some exhaust problems in the past with its EVAP cartridge that caused it to not start (this happened about 7 years ago). Looks like the leak is getting larger, and not sure where it is in the exhaust system. What should I do?