Visual inspection, retrieval and reporting on trouble codes are free of charge. Additional diagnostic may be recommended and charges apply. May not apply to vehicles 1995 and older.  This coupon must be provided at time of drop-off. There is a limit of one coupon per vehicle, and the coupon may not be combined with other offers, discounts, or special fleet pricing. The coupon is valid on most vehicles, but certain exclusions apply. Void where prohibited or if altered.