2005 f-150 xlt won't go foward and is showing codes:P0720 and P2106. What are some things to check?

Asked by Nov 24, 2014 at 08:39 PM about the 2005 Ford F-150 XLT

Question type: Maintenance & Repair

It was a sudden thing that happened. There was no early signs that anything was going out. almost like a light switch effect. The truck has 133,195 miles and has run great up until this point.  I reset the codes and they stay off until I put the brake on and shift into drive while taking the rpms to about 2,000. Then it will shutter and the code lights come on. The"O/D off" light flashes in the cluster also while this is preformed. No leaks, fluid is perfect, and no whine or grind of any kind. Its got to be electronic I'm thinking. Any suggestions?

2 Answers

22,760

I know nothing about trannys, but I put your question to my tranny guy who owns a shop. The 0720 cold would indicate a possible problem with the output speed sensor. A sympton for the tranny is the TCM is not receiving the proper voltage. It could be the sensor itself or a wire. Suggest it be checked out by a tranny shop who has the proper scanning equipment

1 people found this helpful.

I have a 2004 with the 4r70 xmission and I believe that is whats in yours as well. The xmission is horrible and has a design flaw internal. The forward drum lock ring is poorly made and the pressure eventually will cause it to fail and split the forward drum. I just rebuilt my xmission for this same reason. The replacement ring is a complete 360 degree ring that overlaps to ensure a better engagement of the groove and hold the drum better, while the OE ring has a slight gap at the ends. Sorry for the bad news but hope this helps.

Your Answer

Ford F-150 Experts

  • #1
    OJ
    Reputation
    10,220
  • #2
    dandyoun
    Reputation
    4,830
  • #3
    tennisshoes
    Reputation
    3,670
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,781 Great Deals out of 149,286 listings starting at $1,495
Used GMC Sierra 1500
722 Great Deals out of 58,462 listings starting at $1,900
Used Ford F-250 Super Duty
374 Great Deals out of 42,218 listings starting at $1,600
Used Toyota Tundra
478 Great Deals out of 38,526 listings starting at $1,999
Used Dodge Ram 1500
316 Great Deals out of 9,549 listings starting at $800
Used Toyota Tacoma
439 Great Deals out of 44,078 listings starting at $1,995
Used Ford Mustang
270 Great Deals out of 37,082 listings starting at $2,150
Used Chevrolet Colorado
295 Great Deals out of 41,682 listings starting at $1,900
Used Ford F-350 Super Duty
431 Great Deals out of 24,311 listings starting at $3,900
Used Nissan Titan
254 Great Deals out of 22,941 listings starting at $1,995
Used Ford Explorer
801 Great Deals out of 64,315 listings starting at $1,000
Used Chevrolet Silverado 2500HD
361 Great Deals out of 29,859 listings starting at $2,500
Used Chevrolet Tahoe
528 Great Deals out of 36,655 listings starting at $1,375

Used Cars For Sale

2016 Ford F-150 XLT For Sale
27 listings starting at $19,699
2015 Ford F-150 XLT For Sale
1 listings starting at $22,630
2014 Ford F-150 XLT For Sale
24 listings starting at $9,885

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.