2001 Chevy Malibu codes

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

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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2001 Chevy Malibu codes

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