Hey all - Have a 2001 S60 2.4T. Recently the check engine light came on, along with a message - Emission Systems Service Required. After a couple of days, the light went out. A few weeks later, back on again... same message. I took it into the service shop and they said the catalytic converter was "reading low" (whatever the heck that means). The car has 97,000 miles on it, but it seems a little strange that this would be failing so soon. Anyone else have similar experiences? What causes these to fail? Charlie