My customers have a 2001 volvo s60 (my customers love it so much!!!) any way the check engine light came on this morning, it drives the same nothing seems different, my customers took it to advanced auto to run a diagnostics and it came out no codes but the light is still on, my customers know nothing about a volvo's engine Volvo Vocom 88890300 (horrible my customers know) so my customers really have no idea what is triggering my engine light, oh the service light comes on every time my customers start the car but goes off like 30 seconds later and its done that since my customers bought the car last week. any help would be wonderful!! thank you!!