check engine light ??????????????

[maxima]

my check engine light was on ,and plugged my programmer in and it gave me a code of PO456, evap ctrl system small leak , is that bad ? and what is it ? thanks for the info

 

[maxima]

its a 06 gt

 

[SpartaPerformance]

Run a system check from your cluster "odometer" and see if your gas cap is not tightened properly.