Check engine light is on
 

Check engine light just came on while driving back home to Atlanta from Jacksonville, Fl. I had Advance Auto Parts run a scan and the code came up P0420-Catalyst System Efficiency Below Threshold (Bank 1). They suggested take to dealer to have repaired. A couple of questions.

1.How long can I actually drive the car with this issue? I am going to have it repaired within the next week anyway.
2. Is this normally covered under warranty? Car has close to 89,000 miles. Bought used in '03 with 14,000 miles.

RE: Check engine light is on
 

I assume you have a V6. The code seems to show that the O2 sensors, before and after theCAT are showing the same values - CAT is not functioning properly. Emissions may have a 5 year/100,000 mile warranty as per government reg.. It looks like you need a new CAT. You should try to find out why the CAT failed and correct that first. Is the car burning oil? Dealer may replace for free but I would do some research first to make sure the dealer is dealing a straight hand.