WBROWN6

so i let my friend use my stang this weekend, while driving it he said the check engine light came on.....while off codes>>>>>67,10,91.....while on i got 6 92 90........i just put in o2 about 3 months ago....think it might be timing......if you have any suggestions let me know.....thanks...

mr_spider3

what year? how are you reading the codes by the blinks of the check engine light? because those are not codes in either osb1 or osb-2