wanting to buy this car but guy says check engine like comes on sporadic..ideas? on 2002 Volvo S60

as to what would be the cause

Asked by for the 2002 Volvo S60
there are over 1500 codes. my suggestion is tell him to repair it before buying it.

thanks, im over it, i told him it wont pass smog if he doesnt fix whatever it is and hes not gonna do it...so i keep looking

thanks for your help
smart move