What does trouble code PO502 mean on a 2002 Volvo V70?

What is under a 190e Mercedes passenger floor panel? What kind of crops grow in Europe? What does qUAttro mean when it is on my 2004 Audi TT roadster? How long is a Volvo XC90? How does dynamic stability control work? Where is the ecu located on citroen Picasso? What size engine does the 2004 Volvo XC70 have? Where to buy Brazilian VW camper van? Where is the cabin filter of 2005 BMW 530i? How do you remove the glove box in a 2004 Saab 9 3 convertible? What are the dimensions of an alfa romeo 147? How fast is a Lamborghini Aventador? What size engine does the 2013 Audi A5 have? What could cause a knocking noise on front passenger side of car when turning? Will an interior from a peugeot 306 hatchback 4 door fit an estate car 306? Peugeot van injector pipe keeps snapping? What is the wheel base of the 2008 Volvo XC70? What is the Park Distance Control PDC function? What is the oil capacity of a 74 Vw Bus? What is lsz on a BMW car?