I am about to lose it and hope someone can help me out. We have a 2001 Nissan Pathfinder and the service engine light has been on for about 7 months. we first were told after paying $130 that it was because of a gas cap, after 2 gas caps and $260 it is still on. Is there anyway that I can one, check for a code and two, reset this without paying $130 to have it hooked up to the diagnostic machine and $130 to have it reset only for it to come back on???? I am quickly running out of money and patience!!