Service engine on codes P0170 P0171 P0174

Asked by May 16, 2017 at 04:34 PM about the 1999 Ford Taurus SE

Question type: Maintenance & Repair

Service engine on codes P0172 and,P0174?

5 Answers


hi ..i would check for a vacuum leak and add a bottle of ZMAX fuel treatment to 1/3 tank of it a few days..and recheck codes... > P0170 Fuel Trim Malfunction (Bank 1) P0171 System too Lean (Bank 1) P0174 System too Lean (Bank 2) good luck, kelly Read more at: Copyright


here the deal > tips/fuel-trim-can-be-a-valuable-diagnostic-tool/


Lean codes for sure, vacuum leak most probably, check all hoses and lines. Smoke test to help find the leaks.


if no help / fixed then >

29,495 reading my mind above?

Your Answer


Looking for a Used Taurus in your area?

CarGurus has 328 nationwide Taurus listings starting at $5,555.

Postal Code:

Ford Taurus Experts

  • #1
    Tom Demyan
  • #2
  • #3
View All

Related Models For Sale

Used Chevrolet Impala
153 Great Deals out of 1,098 listings starting at $2,488
Used Ford Explorer
36 Great Deals out of 1,604 listings starting at $4,500
Used Ford F-150
521 Great Deals out of 9,917 listings starting at $3,490
Used Ford Mustang
1,030 listings starting at $3,900
Used Honda Accord
60 Great Deals out of 1,259 listings starting at $1,350
Used Chevrolet Malibu
70 Great Deals out of 1,821 listings starting at $2,495
Used Toyota Camry
33 Great Deals out of 1,944 listings starting at $1,995
Used Ford Focus
53 Great Deals out of 2,399 listings starting at $1,495
Used Nissan Maxima
18 Great Deals out of 402 listings starting at $1,995

Used Cars For Sale

2017 Ford Taurus SE For Sale
2 listings starting at $25,098
2014 Ford Taurus SE For Sale
1 listings starting at $15,999

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.