Check engine light stays on. Codes P0171 and P0174. Any answers?

Asked by Apr 13, 2017 at 03:53 PM about the 2004 Ford Taurus SES

Question type: Maintenance & Repair

1 Answer

73,795

P0171 FORD - Fuel Injection System Too Lean Bank 1...Possible causes; Intake air leaks, Faulty front heated oxygen sensor, Ignition misfiring, Faulty fuel injectors, Exhaust gas leaks, Incorrect fuel pressure, Lack of fuel, Faulty Mass Air Flow (MAF) sensor, Incorrect Positive Crankcase Ventilation (PCV) hose connection...If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persistss the front oxygen (O2) sensor may need to be replaced..

Your Answer

Ford Taurus Experts

  • #1
    Tom Demyan
    Reputation
    4,190
  • #2
    dandyoun
    Reputation
    2,020
  • #3
    lightGear
    Reputation
    1,950
View All

Related Models For Sale

Used Chevrolet Impala
520 Great Deals out of 34,218 listings starting at $950
Used Ford Explorer
856 Great Deals out of 63,884 listings starting at $1,000
Used Ford F-150
2,324 Great Deals out of 184,534 listings starting at $699
Used Ford Mustang
713 Great Deals out of 38,332 listings starting at $895
Used Chrysler 300
333 Great Deals out of 17,913 listings starting at $1,295
Used Honda Accord
1,130 Great Deals out of 62,430 listings starting at $1,199
Used Toyota Camry
1,073 Great Deals out of 73,748 listings starting at $295
Used Chevrolet Malibu
1,115 Great Deals out of 71,690 listings starting at $2,499
Used Ford Focus
749 Great Deals out of 53,163 listings starting at $999
Used Nissan Maxima
294 Great Deals out of 23,316 listings starting at $899

Used Cars For Sale

2017 Ford Taurus For Sale
5,155 listings starting at $14,532
2016 Ford Taurus For Sale
28 Great Deals out of 1,902 listings starting at $13,000
2015 Ford Taurus For Sale
37 Great Deals out of 1,450 listings starting at $9,995
2014 Ford Taurus For Sale
59 Great Deals out of 1,207 listings starting at $7,900
2013 Ford Taurus For Sale
51 Great Deals out of 1,309 listings starting at $5,825

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.