1999 Pontiac Grand Am

1999 PONTIAC GRAND AM
Avatar
MRSNICH
  • MEMBER
  • 1 POST
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
Nov 2, 2010 at 10:03 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement