my wife repeatedly called in to Keystone when the check engine light came on this past year(2017) She was told it was most probably loose gas cap, bad fuel, the light was reset without any detailed diagnosis and she was told it was no big deal .. Come for state inspection and now it's a problem, she was kept for four hours and then a further six hours today whilst they diagnosed the check engine light. At no time did they say it would take this long, before she brought it in this morning she was told it would take about an hour , perhaps a little more. Diagnosis of course is catalytic converter ! This could have been diagnosed months ago when we first brought it to their attention and now my wife is told she could be ticketed for no inspection sticker. The attitude of the service guy,' take it to midas or some other place to get it done cheaper". This isn't the first time I've been disappointed by the service dept but it will be the last.