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FORScan codes, As-Built mods & how-tos for every Ford F-150
by VARØ Industries

Tire size / speedometer calibration — F-150 FORScan mod (2021–2026)

Corrects speedometer and odometer after fitting different-diameter tires by setting tire circumference.

Module
BCM — Body Control Module (726)
Model years
2021 2022 2023 2024 2025 2026
Powertrain
Gas (EcoBoost, 5.0L, V6), PowerBoost hybrid, Lightning EV
Trim & equipment
  • Lightning: not verified; values come from gas/PowerBoost trucks
Category
Other
Risk
Medium risk
FORScan setting
Tire Circumference (mm) (BdyCM easy mode)
As-Built
BCM 726-15-01 xxxx xxxx AB-- (first two hex digits of circumference in mm)
BCM 726-15-02 CDxx xx-- (last two hex digits)
As published by the source below. Compare against your own backup; surrounding digits control other features.

Notes

Requires PCM relearn procedure afterwards. DTC P160A reported by some (fix in linked thread). Affects odometer accuracy and shift logic.

How to apply it

  1. Back up every module's As-Built data and keep the files somewhere safe.
  2. Connect FORScan with a battery maintainer on, ignition ON and engine OFF.
  3. Open Configuration and Programming, choose the BCM module, find Tire Circumference (mm) (BdyCM easy mode) and change it.
  4. Write, follow any module reset prompt, cycle the ignition, then confirm the feature and check for new trouble codes.

Sources

More BCM mods

ModModuleCategoryYearsRisk
Allow fog lights with DRLs
Lets the fog lamps be switched on while only the DRLs are active.
⚑ Fog-lamp-equipped trucks
 BCM Lighting 2021–2026 Low risk
Auto relock after unlock
Relocks the truck if you unlock with the fob and no door is opened within the timer.
 BCM Security 2021–2026 Low risk
Disable double horn honk when exiting running truck
Stops the two horn chirps the truck sounds when you walk away with the key fob while the engine is still running.
 BCM Comfort 2021–2026 Low risk
Disable keyfob tailgate release
Removes the ability to drop the tailgate from the key fob.
 BCM Security 2021–2026 Low risk
DRL brightness increase
Raises daytime running light intensity from the dim default toward full brightness.
⚑ Lightning thread lists its own values
 BCM Lighting 2021–2026 Medium risk
DRLs include parking/tail lamps
Turns on the parking lamps (including rear tail-lamp LEDs) whenever DRLs are on.
 BCM Lighting 2021–2026 Low risk