We dropped in without an appointment when the check engine light came on in my 2001 Camry. The manager explained he had no one to diagnose the problem right not and since we were not locals, he offered to come out and look at the car. He checked the fluid levels and a few other things, tightened the gas cap, and said it all looked/sounded fine to him. As we drove away, the light was off - I guess it was that gas cap. I had offered to pay him for his time, but he wasn't having it. We were very grateful for his assistance, so willingly offered.