2001 Chevy Malibu codes

2001 CHEVROLET MALIBU
Avatar
MEX1988
  • MEMBER
  • 1 POST
2001 Chevy Malibu 6 cyl Automatic
----------------------------------------------------------------
the codes p420 and p0303 came up what do they mean
Aug 20, 2008 at 10:03 PM
Advertisement
Avatar
BMRFIXIT
  • ✓ASE Certified Mechanic
  • 19,053 POSTS
  • ASE Certified Mechanic
P0420 is catalytic converter efficiency low
since you have p0303 which is a misfire on cylinder # 3
I would say fix the misfire first
check it for tune up and check the coil
check for exhaust leak
Aug 22, 2008 at 8:01 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.