I am in North Carolina and have a nephew visiting from Maryland. He has a
2000 mustang coupe, 6 cyl, 3.8. Says for several weeks the check engine
light has stayed on. Ford dealer in his area charges to much for diagnostic,
auto zone ran test saying air flow sensor needs replaced. Question is, is
this expensive, can he replace this himself. Also, is there a way to reset
light to make it go off. Car runs fine, no problems, just annoying that
light stays on constantly. Appreciate any info.