engine light...

i took my talon in for an oil change shortly afterwards i got a check engine light and took it back to the shop and they ran dianostics on it and said it was engine code p0170 bank 1 which is a fuel bank error or somthing like that, and then they told me that they couldnt figure out which sensor was giving it or what was  doing it anyone have any ideas? i have  a temp inspection on my car and it wont pass NYS inspection until that light is off so feedback will be very appreciated

I beleive it is attributed to a bad front O2 sensor

Check your gas cap.  Make sure it has the seal on it.  Then check your vapor return line.  Make sure it isn't cracked or damaged.

Agreed with TE

could a vapor problem cause it? because i noticed that when i open my gas cap it has a SERIOUS pressure release 

The pressure release is normal.