2002 pontiac sunfire..engine light on

HELP!!Just purchased ..engine light on steady was on when I bought it.Dealer had it reset.Keeps comming back on.The dealer tells me it is the way I'm puting the gas cap on.They say it is the evap(2)sensor,and not to worry about it.I am worried about it:frown: any suggestions....Please help.It is a Pontiac 2002 Sunfire 2dr.4 cyl.5 speed

yea if it is a sensor that is out make them replace it. Make sure your cap is on correctly and turn till 3 clicks

thanx,I called the dealer and they are going to fix it this week