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

73,175

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
    4,070
  • #2
    dandyoun
    Reputation
    2,000
  • #3
    lightGear
    Reputation
    1,940
View All

Related Models For Sale

Used Chevrolet Impala
74 Great Deals out of 943 listings starting at $1,900
Used Ford Explorer
37 Great Deals out of 1,367 listings starting at $3,900
Used Ford F-150
440 Great Deals out of 9,168 listings starting at $3,000
Used Ford Mustang
11 Great Deals out of 1,181 listings starting at $2,995
Used Chrysler 300
84 Great Deals out of 1,011 listings starting at $1,795
Used Chevrolet Malibu
109 Great Deals out of 2,288 listings starting at $2,599
Used Honda Accord
65 Great Deals out of 1,093 listings starting at $1,200
Used Ford Focus
117 Great Deals out of 2,529 listings starting at $750
Used Toyota Camry
41 Great Deals out of 1,609 listings starting at $2,400
Used Nissan Maxima
26 Great Deals out of 325 listings starting at $1,966
Used Ford Escape
206 Great Deals out of 5,267 listings starting at $1,200
Used Buick LaCrosse
19 Great Deals out of 440 listings starting at $7,700

Used Cars For Sale

2017 Ford Taurus For Sale
19 listings starting at $28,800
2016 Ford Taurus For Sale
8 Great Deals out of 63 listings starting at $22,795
2015 Ford Taurus For Sale
31 listings starting at $9,871
2014 Ford Taurus For Sale
12 listings starting at $15,900
2013 Ford Taurus For Sale
4 Great Deals out of 70 listings starting at $6,995

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.