I have a 2002 Mazda millenia 2.5 it's showing a po303 code which is a misfire in cyl. 3 I've seen several different possible problems doing research on the net but I need a sure fire fix

Asked by Dec 02, 2013 at 10:35 AM about the 2002 Mazda Millenia 4 Dr Premium Sedan

Question type: Maintenance & Repair

I've been told that it may
be the cat but I'm really
not sure

1 Answer

25,315

It will need a Cat if you keep driving it with a miss-fire on the #3 cylinder. Probably a spark plug or plug wire. Catalytic Converters plug up - they do not trip miss-fire codes.

Your Answer

Mazda Millenia Experts

  • #1
    Steven Cisneros
    Reputation
    750
  • #2
    Keith12345
    Reputation
    420
  • #3
    Tom Demyan
    Reputation
    230
View All

Related Models For Sale

Used Mazda MAZDA6
181 Great Deals out of 13,340 listings starting at $1,395
Used Ford Mustang
755 Great Deals out of 42,818 listings starting at $1,300
Used Toyota Camry
1,107 Great Deals out of 72,797 listings starting at $1,000
Used Mazda MX-5 Miata
66 Great Deals out of 4,223 listings starting at $2,000
Used Mercedes-Benz E-Class
478 Great Deals out of 19,753 listings starting at $1,500
Used Nissan Maxima
325 Great Deals out of 23,753 listings starting at $1,550
Used Mazda 626
186 listings
Used Honda Accord
1,030 Great Deals out of 63,283 listings starting at $999
Used Acura TL
179 Great Deals out of 5,032 listings starting at $999
Used Chevrolet Corvette
249 Great Deals out of 22,275 listings starting at $2,500
Used BMW 3 Series
1,042 Great Deals out of 31,744 listings starting at $1,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.