What Caused the Radio to Lock?
Honda's Display Audio system carries the same anti-theft architecture as earlier radios: losing battery power triggers a code request at next startup. Applies to both the base radio and the Display Audio touchscreen.
- Battery replacement — by far the most frequent cause.
- Battery disconnect during repairs — any work that interrupts battery power will re-engage the lock.
- Completely dead battery — a drained battery also triggers the request.
Note: a number of higher-trim Display Audio models from the 2014–2021 period do not use a traditional code-based lock — if the radio never showed "CODE" after a battery change, it could have a different anti-theft method tied to the vehicle VIN.
How the Code Retrieval Process Works for Honda Passport 2023
- Skip long troubleshooting discussions or service visits - you can generate the code online using the radio S/N.
- Start by finding the serial number. The best place to search is on the unit itself, and sometimes you can see it on the Passport's display.
- Type it into the form above, and the system will identify the correct 2023 Passport unlock code.
- After getting it, type it in using Passport's radio controls to unlock the system fully.
- The entire process takes just a short moment and requires no VIN, documents, or technical knowledge.
How Serial Numbers Work and Where to Find Them on 2023 Honda Passport Radios
The first part is to find the radio's serial number.
Depending on the radio unit used in your 2023 Passport, the serial can be accessed either through the display menu or by checking the label on the radio itself.
Below are the most common methods to identify your serial quickly.
2023 Passport - Identifying Your Factory Head Unit
- 8-inch Display Audio with High-Resolution Touch-Screen (Sport, EX-L, TrailSport) - the 8-inch landscape touchscreen carried forward unchanged from the 2022 refresh, with capacitive Home, Back and Brightness touch controls down the left edge and a volume/power knob. Apple CarPlay and Android Auto are standard (wired), along with Bluetooth, SiriusXM, HD Radio and HondaLink. The Sport, EX-L and TrailSport trims pair this head unit with a 215-watt, 7-speaker audio system that includes a subwoofer.
- 8-inch Display Audio with Honda Satellite-Linked Navigation (Touring, Elite) - the same 8-inch hardware as the standard unit but with built-in factory navigation and turn-by-turn directions on the central screen. Touring and Elite trims pair it with a 10-speaker, 590-watt premium audio system. The Elite trim also adds wireless phone charging in the centre console.
- Standard connectivity across the line-up - every 2023 Passport, regardless of trim, comes with the 8-inch Display Audio head unit, Apple CarPlay and Android Auto, Bluetooth HandsFreeLink, SiriusXM-ready hardware (subscription required after the trial), and steering-wheel audio controls. The differences between trims are speaker count, amplifier output and whether built-in navigation is present.
- For code retrieval purposes - the 2023 Passport uses a single head-unit family across the line-up: the 8-inch Display Audio module (with or without the navigation option). Audio package and trim level change the speakers and amplifier, not the physical head-unit module that holds the anti-theft code.
- 2023 vs 2022 reminder - if you are cross-referencing parts or service info, the 2023 Passport carries the 2022 mid-cycle refresh dashboard and infotainment hardware forward unchanged; there are no new infotainment options or hardware changes for 2023.
Check the Display First - Serial Retrieval Without Tools
These are the steps you should follow for 2023 Honda Passport:
The 2023 Honda Passport could have Honda's Display Audio touchscreen (8" depending on trim) or a standard non-touchscreen radio. All versions support serial number display via the 1+6 button method:
- Turn ignition to ON. Let the radio to boot. The screen shows "CODE" if locked.
- Simultaneously press preset buttons 1 and 6 for approximately 3-5 seconds.
- The serial number displays in two halves (e.g.,
U3210+L0482).
Alternative: On 2023 Passport with the Display Audio touchscreen, navigate to Settings → System → Device Information – the serial may be displayed there instead of the button combination.
Check it by Pulling Out the Unit
If the serial number cannot be accessed through menu, use the hardware method.
Most Honda Passport factory radios include a sticker with the serial number printed on the chassis.
The process:
- Remove key from ignition.
- Lift away surrounding mounting frame.
- Remove fasteners holding the radio.
- Move slightly to inspect the label.
If neither methods work on the 2023 Honda Passport:
- Turn off the vehicle.
- Pry off the center stack trim panel. The 2023 Passport's modern dashboard uses snap-fit clips.
- For Display Audio models: Unscrew the fasteners (Phillips) securing the screen unit.
- For standard radios: Unscrew the 4 Phillips screws holding the radio unit.
- Slide the unit out and find the serial on the label on the unit casing.
Note: The Display Audio unit is wider and more integrated than the standard radio. Take care when extracting it.
Removing the Head Unit on a 2023 Passport
- Safety first. Park on a flat surface, set the parking brake, switch the ignition off and take the key/fob out of reach. Disconnect the negative (-) terminal of the 12V battery and wait at least three minutes for the SRS (airbag) capacitor to discharge before touching anything in the centre stack - the passenger airbag harness runs close to the head-unit bezel on the refreshed dashboard.
- Tools. Plastic trim removal tools, a 10mm socket on a short extension, and a small Phillips screwdriver. Masking tape around the bezel will protect the soft-touch dashboard from scuffs during prying.
- Pop the centre bezel. The 2023 Passport keeps the same gloss-black centre-stack panel as the 2022 refresh, surrounding the head unit and the climate controls. Insert a plastic trim tool at the lower edge and work the spring clips loose along the bottom first, then up each side. The whole panel comes forward as one piece. Tilt it toward you and disconnect the climate-control and accessory connectors at the back so the panel can be set aside.
- Unbolt the head unit. Four 10mm bolts hold the radio chassis into the dashboard cradle - two at the top corners and two at the bottom corners. Remove all four, slide the unit straight out a few centimetres, then disconnect the wiring harness, antenna lead, USB ribbon and HDMI ribbon connectors. The head unit is now free.
- Read the serial. The serial number sticker is on the top or the side of the metal radio chassis - normally a small white label with a barcode and an 8-character alphanumeric serial. Photograph it with your phone before reinstalling so you have a clean record for the code request.
- Reassembly. Reverse the sequence - rear connectors first, four 10mm bolts back in, climate panel connectors reattached, trim bezel pressed back into its spring clips, battery negative reconnected last. The radio will prompt for its anti-theft code when the unit powers up.
- Dealer alternative. Any Honda dealer can read the radio serial through their HDS (Honda Diagnostic System) tool on the OBD-II port without removing the unit at all. On a near-new 2023 Passport this is normally the fastest and lowest-risk option, especially if the car is still under warranty and you would rather not disturb the dashboard.
- Check the obvious places first. Before booking a service appointment or pulling trim, check the owner's manual pouch, the glovebox and any paperwork delivered with the car at purchase - Honda dealers often place a small white label with the radio anti-theft code in the glovebox or owner's manual wallet at delivery.
Example: Honda Passport serial number label location
S/N Patterns and Prefixes
Depending on the radio fitted to the 2023 Honda Passport:
U1234L5678– Standard Honda OEM formatHBM####– Found on Display Audio and nav-equipped units913A####– Certain Alpine-manufactured radios
The 2023 Passport may have: base CD radio (U/L format), Display Audio 5"/7" (HBM format), or navigation unit (HBM format). All use a 5-digit unlock code.
Important Make sure you read the serial number, not the part number (which starts with 39100, 39101, or similar Honda part coding).
How the 2023 Passport Serial Looks
The 2023 Passport's 8-inch Display Audio head unit (with or without navigation) uses the standard Honda 8-character alphanumeric serial. The string contains only digits 0-9 and uppercase letters A-Z, with no spaces, dashes or special characters, and is laser-printed or sticker-printed on the metal chassis of the unit. Older Honda single-DIN radios show this same serial in a split 'U' (upper) and 'L' (lower) format on a dealer-mode display that you concatenate into the 8-character string, but whether the 2023 Passport Display Audio still supports that split-display dealer-mode is not publicly confirmed for this model year. The most reliable reference is always the chassis sticker or an HDS read at a Honda dealer.
Final Step - Enter the Radio Code
Now that you've found the serial number and generated the unlock code, the last step is entering it into your radio.
Honda factory radios display a CODE prompt when ready for input.
The process is straightforward, but button layouts and confirmation methods may differ slightly depending on the radio version installed in your Passport.
Entering Process Explained
To input the code on the 2023 Honda Passport:
- Ignition ON. Radio displays "CODE" or "ENTER CODE".
- Non-touchscreen models: Press preset buttons 1-5 to select each digit, then press and hold button 6 to confirm.
- Display Audio touchscreen: An on-screen keypad appears. Tap each digit and press "Enter" or "OK".
Lockout: 3 wrong codes trigger a 60-minute lockout. Leave ignition ON. Do not cycle the key or the timer starts over.
How to Enter the Code on the 2023 Passport
- Touchscreen entry on the 8-inch Display Audio. Every 2023 Passport uses the 8-inch touchscreen, so the entry workflow is the same across all trims. When the unit prompts 'Enter Code', a numeric keypad appears on the touchscreen - tap the five digits of your code in order, then tap Enter (or Done) on the touchscreen. The radio resumes normal operation if the code is accepted, or shows the number of remaining attempts if it is rejected.
- Lockout protection. Honda head units typically lock out after about ten failed attempts and require a one-hour cooldown with the radio powered on before further attempts are accepted. Leave the ignition in accessory and the radio on, then retry once the lockout has cleared.
- VIN-pairing. Some 2023 Display Audio units may revalidate against the VIN through HDS after a 12V battery disconnect. If the correct code is rejected and the unit refuses to unlock, a Honda dealer can re-pair the head unit through their diagnostic tool, normally as a quick service-bay job.
- Quick check before you start. Before you request a code, look in the owner's manual pouch, the glovebox and any paperwork delivered with the car at purchase - Honda dealers commonly place a small white label with the anti-theft code in the glovebox or owner's manual wallet at delivery, which avoids the portal request entirely.
Fixing Common Code Entry Problems for 2023 Passport
The Display Audio era includes radios using multiple serial prefixes depending on the trim level:
U####L####— base CD radio serial (10 characters, two halves).HBM####— Display Audio 5"/7" and navigation modules.913A####— certain Alpine OEM units.
Part numbers on the same label start with 39100 or 39101 — do not submit these. When in doubt, use the Settings → Device Information menu or the 1+6 button method to retrieve the serial directly from the unit.
Entry method depends on the exact radio variant in the Display Audio-era Passport:
- Non-touchscreen base radio: Press preset buttons 1–5 to scroll to each digit, then press and hold button 6 to confirm — same as older Honda platforms.
- Display Audio 5" or 7" touchscreen: An on-screen numeric keypad appears when the code prompt is active. Enter the digits and press OK or Enter on screen.
Should the touch input not work, attempt the physical preset buttons — some units accept both input method. Make sure the screen is fully powered on before starting entry.
For Display Audio-era Honda radios, a rejected code is typically caused by the serial was incorrectly noted. Both the button method and the settings menu can produce the correct serial — verify that the serial you submitted was read off the radio unit and not from the owner's card.
After one failed entry, stop and reach out before trying again — a second wrong attempt gets you one step closer to the 60-minute lockout. A free serial reverification is available on request.
The Display Audio platform enforces the same three-try lockout as older Honda radios. Recovery steps:
- Maintain the ignition in ON or ACC — avoid turning it off.
- Allow the full 60-minute period. The touchscreen might dim during this time — that's normal.
- After 60 minutes, the radio re-displays "CODE" and you can.
For touchscreen units, the lockout countdown runs in the background. Just leave the vehicle running or the ignition on ACC until the timer expires.
If the Display Audio screen comes on but goes straight to the home screen without any "CODE" display, check the following:
- Anti-theft may not have triggered — certain battery changes don't trigger the lock if done quickly enough.
- Certain Display Audio units, the code prompt shows only on the audio portion of the screen, not the navigation display — wait a moment after startup.
- Check the Settings → System → Device Information route; if the serial is visible there, the unit could still be functional without a code.
If none of these apply, a fuse check is the next step — a blown fuse will stop the radio from powering on at all.