my sevice engine soon light come on in my 2002 Mercury Mountaineer. the code reads Po171 Bank 1 system too lean, 2 code Po174 Bank 2 system too lean, 3 Po300 Random- mutiole misfire derected,

Asked by Jun 01, 2013 at 01:04 PM about the 2002 Mercury Mountaineer 4 Dr STD AWD SUV

Question type: Maintenance & Repair

my car is not stalling but when im park it seems as if it wants to cut off, it does not do it when im driving. auto zone said it could be my air fiter sensor and its setting off the rest of the codes. what you think it could be.

6 Answers

I'd go for a tuneup~

1 of 1 people found this helpful.
263,835

P0171 & P0174 is a vacuum leak. Find that first then do the tuneup as Judge suggested.

2 of 2 people found this helpful.
Best Answer Mark helpful
15

might be a air leak between injector and heads,gasket,or fuel filter,or oxygen sensor. hate to say it but probably need to take to someone to do a diagnostic check, maybe ford place. hate all this complicated crap !

1 of 1 people found this helpful.

when you really have an EXPERT on a particular vehicle, NO time is wasted guessing, but the expert goes right to where the problem is and does not waste time guessing...quite, not me~

28,925

The vacuum leak is probably causing the p0300. I wouldnt worry with a tune up unless it is time for one.

3 of 3 people found this helpful.
28,925

And what is the parts store talking about "air filter sensor" they will hire anyone at those places I swear.

3 of 3 people found this helpful.

Your Answer

Mountaineer

Looking for a Used Mountaineer in your area?

CarGurus has 1,073 nationwide Mountaineer listings starting at $1,800.

ZIP:

Mercury Mountaineer Experts

  • #1
    Tom Demyan
    Reputation
    600
  • #2
    kbro
    Reputation
    460
  • #3
    tuff4x4
    Reputation
    300
View All

Related Models For Sale

Used Ford Explorer
1,183 Great Deals out of 69,038 listings starting at $750
Used Ford Expedition
362 Great Deals out of 17,141 listings starting at $1,500
Used Ford Escape
1,217 Great Deals out of 103,126 listings starting at $1,200
Used Jeep Grand Cherokee
1,025 Great Deals out of 71,579 listings starting at $1,195
Used Lincoln Navigator
92 Great Deals out of 3,765 listings starting at $1,955
Used Ford F-150
3,115 Great Deals out of 219,518 listings starting at $1,200
Used Chevrolet Tahoe
802 Great Deals out of 41,552 listings starting at $1,987
Used Nissan Pathfinder
468 Great Deals out of 25,101 listings starting at $2,388
Used Dodge Durango
338 Great Deals out of 24,052 listings starting at $1,500
Used Honda Pilot
655 Great Deals out of 40,539 listings starting at $998
Used Nissan Murano
421 Great Deals out of 22,831 listings starting at $400
Used Toyota 4Runner
339 Great Deals out of 26,151 listings starting at $1,800

Used Cars For Sale

2010 Mercury Mountaineer For Sale
3 Great Deals out of 69 listings starting at $5,957
2009 Mercury Mountaineer For Sale
21 listings starting at $7,995
2008 Mercury Mountaineer For Sale
4 Great Deals out of 137 listings starting at $3,500
2007 Mercury Mountaineer For Sale
3 Great Deals out of 150 listings starting at $2,799
2006 Mercury Mountaineer For Sale
6 Great Deals out of 163 listings starting at $1,899

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.