Advanced FORScan Mod

Tire Size / Speedometer Calibration FORScan Code for F-150

Your truck

Add Tire Size / Speedometer Calibration to a worksheet

$9.99

Choose the year, trim, engine, and drivetrain. Nothing is filled in until you pick it.

Add to worksheet: Tire Size / Speedometer Calibration Build my worksheet — $9.99

YearTrimEngineDrivetrain

Sample

Sample worksheet

Download sample PDF

This is a sample of the layout, not a worksheet for your truck. The paid sheet uses the mods you pick and leaves a blank for each original value. You write any change yourself in FORScan.

Sample rows for a 2020 F-150. These are 2015-2020 addresses, not the 2021+ map.

Module	Address	Your original value	Target value	Notes
BCM	726-27-01	____________	xxxx xxx0 xxxx	Sample layout. 2015-2020 Bambi Mode.
ACM	727-01-01	____________	xxxx x0xx xxxx	Sample layout. 2015-2020 Fake Engine Noise.
BCM	726-41-02	____________	xxx0 xxxx xxxx	Sample layout. 2015-2020 Double Horn Honk Disable.

Sample rows only. A purchased worksheet is built from your year, trim, engine, drivetrain, and selected mods. Worksheet purchases are non-refundable except where required by law.

Tire Size / Speedometer Calibration is an advanced change that rewards careful backups for 2015–2020 Ford F-150 trucks, applied with FORScan over an OBD-II adapter. Updates tire circumference value for speedometer calibration. It is fully reversible and typically takes about 10 minutes to write once your worksheet is in hand.

The change touches the Body Control Module (BCM), and your F-Config worksheet lists all 1 as-built code row with the module, address, and target value. Each row includes a blank for your original value so you can back up before writing changes and roll back later. Helps correct speedometer readings after tire size changes.

Why F-150 owners use it

Helps correct speedometer readings after tire size changes

Where this fits

This is the 2015–2020 circumference row. Do not use it on a 2021 or newer truck. That address layout is Tire Size / Speedometer Calibration (2021+). The 2018 F-150 hub lists the other worksheet items for this generation. Record the original value with the backup guide, add the row in the worksheet builder, and read the FAQ if you are deciding whether the paid sheet is what you need.

Free guide before checkout

Read the free tire-size calibration guide first

Understand speedometer checks, original-value backup, and P160A/wrench-light rollback planning before writing tire-size values.

Open Free Guide

Worksheet rows

Modules

Estimated time

~10 min

Compatibility

2015-2020

How you'll apply Tire Size / Speedometer Calibration

The DIY process from start to finish — backup-first and, where possible, reversible.

Back up your originals first

Before changing anything, use FORScan to read and record the current value of each of the 1 row in the Body Control Module (BCM). Your worksheet leaves a blank beside every row for exactly this.

Write the worksheet values

Enter the 1 target row from your worksheet one at a time. Most owners finish Tire Size / Speedometer Calibration in about 10 minutes with a laptop and a FORScan-compatible OBD-II adapter.

Cycle the ignition and verify

Turn the key off and back on, then confirm the change behaves as expected before moving on. If anything looks off, stop and compare against the originals you recorded.

Roll back anytime

Because Tire Size / Speedometer Calibration is fully reversible, you can put every original value back later and return to stock whenever you want.

Compatible F-150 years

Review year-specific FORScan worksheet context before adding this mod to your build.

2015 F-150 2016 F-150 2017 F-150 2018 F-150 2019 F-150 2020 F-150

Before you write values

Make backups, confirm the adapter can see the truck, and review the FAQ before applying worksheet values.

Worksheet builder Backup original values Adapter guide FORScan will not connect How worksheets work Worksheet FAQ

Printable worksheet preview

Customers get a clean worksheet with original-value blanks, target values, completion checks, and module notes.

Module	Address	Target value	Notes
BCM	726-12-01	xxxx **** xxxx	Use calibrated tire circumference value from the tire-size worksheet

Risk and safety notes

Requires careful backups and confidence working in FORScan.

Changing tire circumference can cause DTCs or a wrench icon on some trucks. Verify with GPS and keep original values.

Required modules

Body Control Module (BCM)

Tire Size / Speedometer Calibration FORScan FAQ

Is Tire Size / Speedometer Calibration safe to do on my F-150?

It is rated advanced. It is well within reach for a careful DIYer, but back up your original values and work through the worksheet one row at a time.

Is Tire Size / Speedometer Calibration reversible?

Yes. This change is fully reversible as long as you record your original as-built values first. Your worksheet leaves a blank for each original value so you can roll back to stock.

Which modules does Tire Size / Speedometer Calibration change?

It writes 1 code row to the Body Control Module (BCM). Each row is listed in your worksheet with its address and target value.

How long does Tire Size / Speedometer Calibration take with FORScan?

Most owners finish Tire Size / Speedometer Calibration in about 10 minutes once they have the worksheet, a laptop, and a FORScan-compatible OBD-II adapter.

What F-150 years does Tire Size / Speedometer Calibration work on?

Tire Size / Speedometer Calibration applies to 2015–2020 F-150 trucks. Compatibility can still vary by trim, package, and module software version, so confirm against your own as-built data.

Anything to watch out for with Tire Size / Speedometer Calibration?