Why Is the Radio Asking for a Code?
Mid-era Honda radios have the same anti-theft logic as earlier models: any loss in battery power causes the code prompt on the next startup. Typical triggers include:
- Battery replacement or disconnect — by far the most common cause.
- Battery drain — a completely discharged battery has the same effect.
- Fuse replacement — swapping the radio fuse block can momentarily cut power and activate the lock.
- Workshop electrical work — any service that involves disconnecting the battery will cause this.
Using the correct code removes the lock and normal function is restored immediately. The lock only comes back if power is disconnected again.
Finding the Radio S/N for Honda
Very useful fact to know is that factory radios use a specific serial number to identify each unitindividually.
Your anti-theft system matches the code directly to the serial.
Unlike vehicle-specific data such as VIN or registration info, it is not determined by the model or production year, so you'll be able to retrieve it even if you have a radio that you bought afterwards.
Depending on the maker and radio installed in your Honda Fit, the access method is different.
These are the best ways to locate it.
Factory Radios on the 2011 Honda Fit
The 2011 model year is a carry-over of the 2nd-generation GE Fit and uses the same factory audio family as the 2009-2010 cars. Honda continued to offer two single-DIN CD-based receivers across the line, with the optional Alpine-sourced touchscreen navigation unit at the top of the range. The trim badge and a quick look at the centre stack are enough to tell the three apart.
The base Fit carries a 4-speaker AM/FM/CD receiver with an aux input jack and a USB input in the upper part of the glove box - basic monochrome display, no factory Bluetooth. The Fit Sport uses the same single-disc CD receiver but adds two dash tweeters (6 speakers total) and AM/FM/CD/MP3/WMA decoding, with aux and glove-box USB carrying over. The Fit Sport with Navigation replaces the standard CD head unit with the Alpine-supplied AVN-DVD touchscreen navigation receiver (Honda part number 39540-TK6-.), available only on the Sport trim.
To identify yours quickly, look at the centre stack: a single-DIN CD slot with a small monochrome display is the base or Sport non-nav unit, while a wider colour touchscreen with an integrated DVD-based map disc is the Sport with Navigation unit. Glove-box USB and front aux are present on all 2011 Fit factory radios from new. All three units use the standard Honda anti-theft system and will display CODE (or Err after a wrong attempt) once they have lost 12V power; the navigation unit additionally has a separate NAV CODE tied to the same chassis serial.
Using Hidden Radio Menus to Find the Serial
The method for 2011 Honda Fit is this:
The 2011 Honda Fit is equipped with a double-DIN radio featuring a small LCD display. The serial number is displayed using the preset button method:
- Turn ignition to ON or ACC. The radio shows "CODE" or "ENTER CODE".
- Hold down buttons 1 and 6 together for about 5 seconds.
- The display cycles through the serial number in two segments: first half (e.g.,
U3210) then second half (e.g.,L0482).
Note: On some 2011 Fit radios with nav screens, the serial may show up in the Settings → System Information menu. Try this before using buttons if your model has a navigation unit.
Reading the Serial on the 2011 Fit Without Removing the Radio
The 2nd-gen GE Fit head units fitted to the 2011 Fit support Honda's dealer-mode preset shortcut, so in most cases you can read the radio's 8-character serial number directly from the dash without pulling the unit. This is the same procedure documented by Honda dealer service departments for 2007-2020 Honda vehicles, and it is widely confirmed for the 2011 Fit on owner forums.
Sit in the driver's seat with the doors closed and turn the ignition to the ON/II position (engine does not need to be running). Make sure the radio is off. Press and hold preset buttons 1 and 6 at the same time, then - while still holding them - press the power/volume knob to switch the radio on. The display alternates between a U screen showing the first 4 characters of the serial (for example U2200) and an L screen showing the last 4 (for example L0055). Ignore the U and L letters; the actual serial is the 8 characters that follow them combined (for example 22000055).
If the shortcut does not work, confirm you held 1+6 before pressing power, not after. If the unit is already in lockout (Err on screen), the dealer-mode display can be unavailable until the lockout clears. On the Sport with Navigation unit, the same 1+6 trick still applies to the head unit's audio side - the chassis serial it returns is what Honda's portal expects. If the 1+6 method does not give a clean serial, the next step is the physical removal procedure to read the serial from the chassis label.
View it by Pulling Out the Radio
If the serial number cannot be accessed through menu, use the hardware method.
Most Honda Fit factory radios include a sticker with the serial number printed on the chassis.
Step-by-Step:
- Power down the vehicle.
- Lift the trim surrounding the radio.
- Unscrew the mounting bolts.
- Slide the unit forward to access the label.
The serial number is usually located near the printed code.
If the 1+6 method fails to display the serial on your 2011 Honda Fit:
- Power down the vehicle.
- Pry off the radio bezel with a plastic pry tool. The 2011 Fit's double-DIN radio sits within a bezel attached by clip fasteners.
- Remove the 4 Phillips-head screws fastening the radio to the dash.
- Pull the unit out to access the serial label on the radio housing.
Note: The 2011 Fit's larger radio is heavier than single-DIN units. Support it with both hands when sliding it out.
Removing the Factory Radio on the 2011 Fit
If the dealer-mode 1+6 shortcut does not give a clean serial and the wallet card and glove box sticker are missing, the most reliable way to read the serial on a 2011 Fit is to pull the head unit out and copy the chassis label directly. The 2nd-gen GE centre stack is held by retaining clips with a small number of screws, so the work is straightforward but should be done with care because of the SRS airbag wiring near the dash.
Safety first
Turn the ignition fully off and remove the key from the cylinder. Disconnect the negative terminal of the 12V battery and wait at least three minutes before working near the dash so the SRS capacitor can fully discharge. Avoid touching or pulling on any yellow airbag connectors while the trim is loose.
Tools you will need
A Phillips screwdriver for the radio retaining screws, a plastic trim/panel pry tool to release the dash bezel clips without scratching, an 8mm socket or short driver for any nutted fasteners hidden behind the cup-holder panel, and a phone or camera for a clear photo of the chassis label.
Removal overview
Pop out the small panel above the cup-holders in the centre console - it is clipped, not screwed - and look in the access holes; the one on the far right reveals a hidden Phillips screw. Gently pry off the centre dash bezel that surrounds the radio and HVAC controls, walking the pry tool around each clip until the bezel comes free, and disconnect any wiring (hazard switch, etc.) from the back of the bezel before setting it aside. Remove the visible Phillips screws securing the radio to the dash frame, slide the head unit forward, and unplug the wiring harness and antenna lead from the rear of the unit.
Where the serial is printed
Look on the top, side or rear face of the metal chassis for a white or silver thermal-printed label. The label carries a Honda part number (for example 39100-TK6-A01 on non-nav units, 39540-TK6-.. on the Alpine navigation unit) and a separate serial line. Copy the longest alphanumeric string next to the barcode; that is the serial, not the part number.
Tips
Photograph the label rather than copying by hand, so characters such as O vs 0 and I vs 1 can be re-checked later. Reassembly is the reverse of removal: connectors back on, screws home, bezel pressed in until each clip seats, then reconnect the battery and enter the radio code to bring the unit back online.
Example: Honda Fit serial number label location
These are the Common Serial Formats
The 2011 Honda Fit radio serial number uses the standard Honda OEM format:
U1234L5678– Primary Honda factory format – two halves displayed separately (U####thenL####), combined into a 10-character serial
Radio manufacturers for the 2011 Fit: Alpine (most common) or Panasonic. Navigation models could use a separate module but typically use the same U/L two-part serial format.
Reminder Record the full serial exactly – a single wrong character will generate an incorrect code.
Common Serial Number Formats on 2011 Fit Radios
Factory Honda head units in the 2011 Fit carry a printed serial number on the chassis label and also expose it via the 1+6 dealer-mode shortcut. Both methods give the same 8-character alphanumeric string, which is what Honda's online code portal and any third-party Honda code service expect.
The serial is an alphanumeric string of 8 characters printed next to the barcode on the chassis label. On the dash, the dealer-mode display splits the same 8 characters into two screens: U + first 4 (for example U2200) and L + last 4 (for example L0055). The label also lists a Honda part number - 39100-TK6-A01 on the non-nav single-CD head unit, or 39540-TK6-.. on the Alpine touchscreen navigation unit. These are part numbers, not serials, and should not be entered into a code lookup tool.
To use the serial, combine the U and L digits with no leading letter and no separator - for example, U2200 + L0055 becomes 22000055. Double-check ambiguous characters such as O vs 0 and I vs 1 by comparing the dash readout with the printed label, especially if the OLED segments are dim. If your string does not look like an 8-character alphanumeric serial, confirm that you copied the serial line and not the Honda part number, which sits separately on the same label.
Code Entry Process for 2011 Fit
Now that you've found the radio serial and retrieved the unlock code, the last step is entering it into your radio.
Honda OEM units display a CODE prompt when ready for input.
The process is usually quick, but button layouts and confirmation methods may differ slightly depending on the radio version installed in your Fit.
The Correct Way to Enter It
To enter the code on the 2011 Honda Fit's radio:
- Ignition ON. Radio shows "CODE".
- Use preset buttons 1-5 to enter each digit of the 5-digit unlock code. Each button scrolls digits 0-9.
- Press and hold button 6 for 2-3 seconds to submit.
Lockout: Three incorrect attempts = 60-minute lockout. Keep ignition ON the entire time. Turning off the ignition resets the lockout timer.
Entering the 5-Digit Code on the 2011 Fit
Once you have the correct 5-digit anti-theft code for your 2011 Fit radio, the entry process is fast, but you have a strict attempt limit before the radio locks itself out, so verify the code and the serial it came from before you start.
You only get around 10 attempts. After roughly ten consecutive wrong codes, the factory Honda radio enters a lockout state and the display shows Err or E. To clear the lockout, leave the ignition in the ACC/ON position with the radio powered up for one continuous hour, then try the correct code again. Cycling the key off does not always shortcut the timer, so do not hammer guesses at the unit.
To enter the code by presets, turn the ignition to ACC or ON so the radio powers up and shows the CODE prompt. Press preset 1 the number of times needed for the first digit of the 5-digit code (press once for 1, twice for 2, etc.). Press preset 2 for the second digit, 3 for the third, 4 for the fourth, and 5 for the fifth - the radio normally accepts the code automatically and resumes audio. Some 2011 Fit head units also accept the code via the tuning knob - rotate to set each digit, then press SCAN, TUNE or the power button to confirm. On the Sport with Navigation, the on-screen keypad is the primary method - tap each digit on the touchscreen, then confirm.
If it does not unlock, stop after the second wrong attempt and re-verify the 8-character serial number you used to obtain the code, making sure no leading letter or trailing digit was dropped. If Err appears, leave the ignition in ACC/ON for the full one-hour cooldown before retrying.
Step-by-Step Honda Fit 2011 Radio Code Retrieval Guide
Getting your radio code takes only 4 simple steps.
- Find the radio's serial - this is the only information required to generate the correct unlock code.
Unlike when contacting the dealer, no VIN or paperwork is needed. - When you've found the S/N, type it into the form above.
The system checks it against a database of supported units and automatically retrieves the matching security code. - In most cases, the code appears instantly on the screen after payment and is also sent to your email , just in case.
If we need to check it manually, you'll be notified before checkout. - When you get it, just enter it into your radio to restore the functionality.
Understanding Unlock Issues with Your Fit
After three wrong attempts, the double-DIN Honda radio goes into lockout mode and shows an error or refuses input. To recover it:
- Leave the ignition in the ON position — don't switch it off.
- Wait the full 60 minutes to elapse. Switching off at any point resets the waiting period.
- After the hour, the radio will display "CODE" again.
Navigation-equipped 2011 Fit units follow the same 60-minute lockout procedure. If the unit still won't accept codes after waiting, the unit may need a dealer diagnostic.
The double-DIN Honda radio uses the same button layout as the older single-DIN platform:
- Preset buttons 1–5 — each press scrolls through digits 0–9 to enter that digit of the code.
- Button 6 — press and hold for 2–3 seconds to confirm the full code.
On some 2011 Fit nav units, the preset buttons may be arranged slightly differently or accompanied by soft keys. If that applies, the confirmation button is still the rightmost preset or a dedicated ENTER button.
Code rejection on the double-DIN Honda is almost always traced back to a misread serial. The serial label on the radio housing contains both the serial and the part number — confirm you copied the serial (U####L####) and not the part number.
After a rejected attempt, do not entering more guesses — there are only 3 tries before a 60-minute lockout. Reach out to us with the serial for a no-charge reverification before retrying.
The serial number pattern for the mid-generation Honda radio follows one of:
U####L####— the standard two-part Honda serial (first half starts with U, second with L).HBM####— used on navigation and certain premium configurations.913A####— used by Alpine-manufactured modules.
The part number printed alongside start with 39100 or 39101 — never submit those. If uncertain, use the 1+6 button method to display the serial on the screen itself.
If the radio turns on without showing the "CODE" screen, consider these scenarios:
- It could still be unlocked — try normal operation to confirm.
- Some 2011 Fit radios display "ENTER CODE" rather than just "CODE" — both message means the same thing.
- On nav-equipped units: the nav screen may come up first the code screen. Give it a moment for the audio system to boot separately.
Should no code screen appears at all, verify the radio fuse — a blown radio fuse will prevent the unit from powering on.