2001 Chevy Malibu codes

Tiny
MEX1988
  • MEMBER
  • 2001 CHEVROLET MALIBU
2001 Chevy Malibu 6 cyl Automatic

the codes p420 and p0303 came up what do they mean
Wednesday, August 20th, 2008 AT 10:03 PM

1 Reply

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
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
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Friday, August 22nd, 2008 AT 8:01 AM

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