I have a code po174 system too lean that keeps coming on on my 2003 Lincoln navigator, I've changed all o2 sensors, a vent hose, checked maf, sprayed carb cleaner lookin for leaks an can't find anything, anyone else had this problem?

Asked by Oct 29, 2015 at 02:08 PM about the 2003 Lincoln Navigator Luxury

Question type: Maintenance & Repair

1 Answer

43,625

Other causes are: Plugged fuel filter, low fuel pressure (bad fuel pump) bad fuel regulator or leaking regulator, dirty injectors, leaking vacuum line, pcv leaking, stuck or bad egr valve and bad maf.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Lincoln Navigator Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Lincoln Navigator Experts

#1 jimmyarango
jimmyarango
Reputation 1,390
#2 T_S_T
T_S_T
Reputation 380
#3 dandyoun
dandyoun
Reputation 280
View All

Related Models For Sale

Used Ford Expedition
476 Great Deals out of 24,870 listings starting at $1,500
Used Cadillac Escalade
296 Great Deals out of 10,301 listings starting at $1,900
Used Chevrolet Tahoe
833 Great Deals out of 28,003 listings starting at $1,700
Used Chevrolet Suburban
557 Great Deals out of 19,206 listings starting at $1,964
Used GMC Yukon
559 Great Deals out of 17,232 listings starting at $1,875
Used Ford Explorer
1,096 Great Deals out of 72,155 listings starting at $1,000
Used GMC Yukon XL
351 Great Deals out of 12,087 listings starting at $2,200
Used Cadillac Escalade ESV
120 Great Deals out of 5,636 listings starting at $4,470
Used Ford F-150
3,110 Great Deals out of 209,134 listings starting at $1,200
Used Lincoln Aviator
7 Great Deals out of 293 listings starting at $1,729
Used Infiniti QX56
100 Great Deals out of 1,858 listings starting at $4,995
Used Nissan Armada
165 Great Deals out of 7,544 listings starting at $3,900
Used Dodge Durango
373 Great Deals out of 23,256 listings starting at $1,500
Used Toyota Sequoia
168 Great Deals out of 6,032 listings starting at $1,495

Used Cars For Sale

2017 Lincoln Navigator For Sale
2,132 listings starting at $56,266
2016 Lincoln Navigator For Sale
23 Great Deals out of 1,014 listings starting at $38,989
2015 Lincoln Navigator For Sale
13 Great Deals out of 441 listings starting at $33,000
2014 Lincoln Navigator For Sale
9 Great Deals out of 152 listings starting at $20,990
2013 Lincoln Navigator For Sale
21 Great Deals out of 277 listings starting at $17,800