1999 Pontiac Grand Am 4 cyl Automatic
Have a 1999 Grand Am trying to get it inspected. Code P0420 keeps coming up. Replaced oxygen sensor and P0420 is still coming up. What do I need to do really need car to pass inspection
Have a 1999 Grand Am trying to get it inspected. Code P0420 keeps coming up. Replaced oxygen sensor and P0420 is still coming up. What do I need to do really need car to pass inspection
Nov 2, 2010 at 10:03 AM