I had been getting the P0456: Small evap leak code ever since I did the airbox mod ... nothing serious but I didnt like my CEL lit up, I wouldn't know if something else caused it 'cuz I had this recurring code ... I didn't want to spend $150 for other readers so I got this for $50 off ebay ...
This is what I got http://www.auteltech.com/gs300.htm ... does what I want it to do, scan the CEL and clear it ... works like a charm ... hopefully it lasts and doesn't screw up anything else, lol ... Definitely recommended for someone who just wants the basic functionality at an affordable price ...