Q: Scan code P0456 Mod$13 on 2002 Volvo S40

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My car is due for the NYS inspection and my check engine light came on. I check and the scan code is P0456 Mod$13. What do I need to do to resolve it? Will I be able to pass my inspection if not fixed?
(1) Answer
The code indicates a small leak in the EVAP system. It could be a reason for a loose gas cap- that's the most common, but there could be another leak somewhere, which may require a smoke pump to check.
The car will fail the NY State Inspection when the CEL is on or the drive cycle is incomplete after the ECM is reset.
I'd check the fuel filler cap, make sure it's tight, reset the code, drive it for several days and see if the CEL returns.
Make sure the fuel level is between 1/4 and 3/4, otherwise the EVAP test won't run.