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

24,225

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

Add photo

Related Questions

Search Mazda Millenia Questions

Mazda Millenia Experts

#1 Steven Cisneros
Steven Cisneros
Reputation 710
#2 Keith12345
Keith12345
Reputation 420
#3 Tom Demyan
Tom Demyan
Reputation 230
View All

Related Models For Sale

Used Nissan Maxima
305 Great Deals out of 25,213 listings starting at $999
Used Honda Accord
812 Great Deals out of 84,287 listings starting at $1,050
Used Mazda MX-5 Miata
51 Great Deals out of 4,229 listings starting at $1,995
Used Jeep Grand Cherokee
1,022 Great Deals out of 74,888 listings starting at $750
Used Mazda MAZDA6
121 Great Deals out of 16,000 listings starting at $1,995
Used Dodge Durango
273 Great Deals out of 22,704 listings starting at $1,200
Used Mazda 626
207 listings starting at $2,995
Used Mazda Protege
253 listings
Used Mazda Tribute
18 Great Deals out of 936 listings starting at $995
Used Ford Mustang
470 Great Deals out of 45,735 listings starting at $1,999
Used Honda Civic
657 Great Deals out of 88,604 listings starting at $995
Used Nissan Altima
1,030 Great Deals out of 81,564 listings starting at $1,200
Used Acura RL
20 Great Deals out of 655 listings starting at $1,990
Used Ford Focus
539 Great Deals out of 57,171 listings starting at $1,095

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.