overdrive light flashes and trans shifts hard

Asked by ycems779 Dec 20, 2014 at 11:02 AM about the Ford F-250

Question type: Maintenance & Repair

Ford f150 2wd 300 i6, overdrive light flashes and trans shifts hard, turn overdrive switch
off and trans shifts smooth. Scanned and got codes p0171 and p0174 you can delete
codes and truck will run and shift fine for 10-20 minutes and then the light starts flashing
and trans shifts hard again. Changed fluid and filter even though fluid looked new and was
not burnt and no shavings or anything in the pan. Thank you for any help.

1 Answer

25,265

Those codes are related to a lean condition. It points to a dirty mass air flow sensor. The ECU is confused as to how much air is passing through the intake. I would recommend cleaning the MAF sensor and see if this clears the problem. If you say the trans. shifts okay with the codes clear, then this is probably the issue. There is a spray cleaner available at the auto parts store for cleaning the sensor. Follow the instructions as the MAF is very fragile.

6 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    Gene Arnett
    Reputation
    2,070
  • #2
    MikeSt
    Reputation
    1,000
  • #3
    MrRatchet42
    Reputation
    810
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-250 Super Duty
27 Great Deals out of 1,201 listings starting at $8,995
Used Ford F-150
299 Great Deals out of 15,725 listings starting at $1,712
Used Chevrolet Silverado 2500HD
20 Great Deals out of 1,146 listings starting at $8,999
Used Ford F-350 Super Duty
36 Great Deals out of 2,603 listings starting at $8,888
Used GMC Sierra 2500HD
17 Great Deals out of 1,712 listings starting at $12,900
Used RAM 2500
45 Great Deals out of 2,202 listings starting at $14,998
Used Dodge RAM 2500
27 listings starting at $4,000
Used Chevrolet Silverado 1500
171 Great Deals out of 5,940 listings starting at $3,995
Used GMC Sierra 1500
128 Great Deals out of 6,854 listings starting at $3,975
Used Toyota Tundra
47 Great Deals out of 1,145 listings starting at $5,999
Used RAM 1500
469 Great Deals out of 15,523 listings starting at $5,000
Used Dodge RAM 1500
4 Great Deals out of 80 listings starting at $4,000
Used Ford Mustang
49 Great Deals out of 1,268 listings starting at $4,995
Used Ford F-350
1 listing
Used Toyota Tacoma
54 Great Deals out of 1,033 listings starting at $8,708

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. Content will be removed if CarGurus becomes aware that it violates our policies.