Check engine code reads P0304, what does this mean?

Asked by Mar 05, 2017 at 11:33 AM about the 1997 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

engine light came on , water is fine and oil and votage is okay what is the problem??

1 Answer

54,625

P0304 is a miss-fire of the #4 cylinder. #4 is the rear cylinder on the passenger's side. Possible causes are bad sparkplug, bad ignition coil, bad fuel injector, problem with the injector electrical connector. How many miles on this Mercury? When were the spark plugs last changed?

Your Answer

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,830
  • #2
    kbro
    Reputation
    2,150
  • #3
    Js08016
    Reputation
    1,910
View All

Related Models For Sale

Used Lincoln Town Car
29 Great Deals out of 1,721 listings starting at $1,004
Used Ford Crown Victoria
5 Great Deals out of 900 listings starting at $1,496
Used Chevrolet Impala
567 Great Deals out of 36,776 listings starting at $990
Used Chevrolet Tahoe
856 Great Deals out of 44,858 listings starting at $1,980
Used Ford Mustang
610 Great Deals out of 39,011 listings starting at $1,500
Used Ford F-150
3,190 Great Deals out of 239,353 listings starting at $1,300
Used Chevrolet Camaro
499 Great Deals out of 33,551 listings starting at $1,450
Used Honda Accord
1,192 Great Deals out of 74,709 listings starting at $561
Used Chevrolet Caprice
155 listings starting at $7,995
Used Ford Taurus
221 Great Deals out of 15,249 listings starting at $1,850
Used Mercedes-Benz S-Class
165 Great Deals out of 8,041 listings starting at $2,000

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
25 listings starting at $5,450
2010 Mercury Grand Marquis For Sale
4 Great Deals out of 91 listings starting at $3,995
2009 Mercury Grand Marquis For Sale
4 Great Deals out of 79 listings starting at $2,995
2008 Mercury Grand Marquis For Sale
5 Great Deals out of 135 listings starting at $2,495
2007 Mercury Grand Marquis For Sale
7 Great Deals out of 143 listings starting at $1,995

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.