Auxiliary External Subwoofer Enable (2021+) FORScan Code for F-150
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Add Auxiliary External Subwoofer Enable (2021+) to a worksheet
$9.99
Choose the year, trim, engine, and drivetrain. Nothing is filled in until you pick it.
Sample
Sample worksheet
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 2021 F-150. These are 2021+ addresses. Auto Start/Stop is not in this sample.
| Module | Address | Your original value | Target value | Notes |
|---|---|---|---|---|
| BCM | 726-39-02 | ____________ | xxx0 xxxx xx-- | Sample layout. 2021+ Bambi Mode. |
| ACM | 727-01-01 | ____________ | xxxx xxxx 0x-- | Sample layout. 2021+ Fake Engine Noise. |
| BCM | 726-63-02 | ____________ | xxx0 xxxx xx-- | Sample layout. 2021+ 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.
Auxiliary External Subwoofer Enable (2021+) is an advanced change that rewards careful backups for 2021–2023 Ford F-150 trucks, applied with FORScan over an OBD-II adapter. Configures the audio module for an external powered subwoofer. It is fully reversible and typically takes about 10 minutes to write once your worksheet is in hand.
The change touches the Audio Front Control Module (ACM), and your F-Config worksheet lists all 3 as-built code rows 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. Factory head unit feeds an aftermarket powered sub on a line-level output.
Why F-150 owners use it
Factory head unit feeds an aftermarket powered sub on a line-level output
Worksheet rows
3
Modules
1
Estimated time
~10 min
Compatibility
2021-2023
How you'll apply Auxiliary External Subwoofer Enable (2021+)
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 3 rows in the Audio Front Control Module (ACM). Your worksheet leaves a blank beside every row for exactly this.
Write the worksheet values
Enter the 3 target rows from your worksheet one at a time. Most owners finish Auxiliary External Subwoofer Enable (2021+) 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 Auxiliary External Subwoofer Enable (2021+) 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.
Before you write values
Make backups, confirm the adapter can see the truck, and review the FAQ before applying worksheet values.
Printable worksheet preview
Customers get a clean worksheet with original-value blanks, target values, completion checks, and module notes.
| Module | Address | Target value | Notes |
|---|---|---|---|
| ACM | 727-01-01 | xxxx xAxx xx-- | Speaker and tweeter, external sub, no centre channel |
| ACM | 727-01-01 | xxxx xBxx xx-- | Speaker and tweeter, external sub, centre channel on internal amplifier |
| ACM | 727-01-01 | xxxx x2xx xx-- | Non-tweeter speakers, external sub, no centre channel |
Risk and safety notes
Requires careful backups and confidence working in FORScan.
Required modules
Auxiliary External Subwoofer Enable (2021+) FORScan FAQ
Is Auxiliary External Subwoofer Enable (2021+) 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 Auxiliary External Subwoofer Enable (2021+) 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 Auxiliary External Subwoofer Enable (2021+) change?
It writes 3 code rows to the Audio Front Control Module (ACM). Each row is listed in your worksheet with its address and target value.
How long does Auxiliary External Subwoofer Enable (2021+) take with FORScan?
Most owners finish Auxiliary External Subwoofer Enable (2021+) in about 10 minutes once they have the worksheet, a laptop, and a FORScan-compatible OBD-II adapter.
What F-150 years does Auxiliary External Subwoofer Enable (2021+) work on?
Auxiliary External Subwoofer Enable (2021+) applies to 2021–2023 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 Auxiliary External Subwoofer Enable (2021+)?
Only use with an external powered subwoofer actually wired to the line-level output. This single value also sets the speaker-4 output type and the centre channel, so pick the row matching your speaker setup and record the original value first. Different field than the 2015-2020 version. Confirmed for 2021-2023; the 2025-2026 audio module handles subwoofers differently and is not covered here.
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