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Thread: 2017 F-150: "See Manual" When re-calibrating Speedometer

  1. #1
    Tuner in Training
    Join Date
    Oct 2014
    Posts
    18

    Exclamation 2017 F-150: "See Manual" When re-calibrating Speedometer

    I have a 2017 F-150 Limited 4x4 and I recently got a lift kit and 325/50/22 tires (basically 35")
    My truck is tuned with HPTuners and in order for me to calibrate the speedometer I have to open up VCM Scanner and change the "Revolutions Per Mile" Although it does correct the MPH it causes a Wrench saying "See Manual" to appear on the display and FordPass app says "Powertrain Malfunction/Reduced Power" although the truck has no reduction in power and runs fine.
    I noticed that if I look at the TCU values using ForScan the line
    754-03-06 - 7800-7D7D-7D53
    Changes to
    754-03-06 - 0078-7D7D-7D53

    Anyone have any tips or tricks to get around this? I tried driving the truck 800 miles this weekend and nothing happened.
    Last edited by PegasoLS3; 04-02-2018 at 01:06 PM.

  2. #2
    Tuner
    Join Date
    Jun 2017
    Location
    South East Georgia
    Posts
    127
    Lookup the forscan thread, they go over the procedure required to change tire size on the 2017+

  3. #3
    Tuner in Training
    Join Date
    Aug 2017
    Posts
    27
    Quote Originally Posted by PegasoLS3 View Post
    I have a 2017 F-150 Limited 4x4 and I recently got a lift kit and 325/50/22 tires (basically 35")
    My truck is tuned with HPTuners and in order for me to calibrate the speedometer I have to open up VCM Scanner and change the "Revolutions Per Mile" Although it does correct the MPH it causes a Wrench saying "See Manual" to appear on the display and FordPass app says "Powertrain Malfunction/Reduced Power" although the truck has no reduction in power and runs fine.
    I noticed that if I look at the TCU values using ForScan the line
    754-03-06 - 7800-7D7D-7D53
    Changes to
    754-03-06 - 0078-7D7D-7D53

    Anyone have any tips or tricks to get around this? I tried driving the truck 800 miles this weekend and nothing happened.
    Check GWM first.