Question about 2003 Volvo S40

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Radio code A technician at Auto Zone disconnected my battery when replacing a haedlight bulb. I cannot find the 4 digit code in any of my paperwork. Is there a default code or do I have to take it to a dealer?

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You may be able to call the service dept and get the number.  I remember just visiting the dealer to get mine.  My car was bought used so don't know if the code was in the original paperwork.

Posted on Nov 28, 2008

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Please i need a 4 digit radio code for my radio as a result of changing my car battery..below are my serial number and details Serial No.-BP**********80 Part No.- **********


If the radio code is not recorded in any paperwork that came with you car ...
You either have to contact the dealership, giving details of your car .. chassis/engine number ..
Or buy one from Ebay.com

Or.. go to a shop that fits radios and ask/pay them.
There's nobody on Fixya who can give you a radio code

Mar 24, 2016 | Cars & Trucks

1 Answer

My 2005 Honda pilot had battery disconnected then read code and now says error? I tried putting in radio code still error?


Sounds like you have the wrong code, maybe the radio was replaced? Hold preset buttons 1 and 6 then turn on the radio. It will display the radio serial #, 4 digits then 4 more. Dealer can get you the code. Or you can register at the owners site online and get the code yourself.

Jan 25, 2015 | 2005 Honda Pilot

2 Answers

My arcua 3.2 cl there's something wrong wit my battery and now I'm not able to turn the radio on it's asking for some type of code.


any time the battery is disconnected or the radio removed you have to enter the radio pin which is usually inside the glove box or in the trunk lid it is a white stick and it will have a five digit number use the preset buttons to enter the code

Feb 27, 2011 | 2001 Acura 3.2CL

2 Answers

My battery went dead on my ford fusion 2008 now my radio doesn't work


As with many newr cars, Your radio probably had a security code which is required to reset it after the radio is removed or power was disconnected from it. You probably have the code written somewhere in your new car paperwork. If not, contact your dealer. They can probably guide you through resetting the code.

Nov 03, 2010 | 2006 Ford Fusion

1 Answer

I replaced my #1 injector because it wasn't working and had the battery disconnected for about 5 hours. After I completed the job I reconnected the battery and the car was idling rough and is getting...


It sounds like with the amount of issues you have described, your ECM may be the problem and will need to be replaced. You can get one from the Salvage yard or you can get one from the Auto Zone, you are going to have to get the new ECM flashed to the information stored to your car's PRO codes and to have your radio work again.
Thank you for using fixya and i believe Auto Zone sells the ECM for around $150.00.

Jul 20, 2010 | 2002 Saturn L-Series

1 Answer

Check engine light


easiest way is to disconnect battery and let sit for a few minutes but sometimes if u dont code off the radio will have to get code to reset --best and safest is go and have car scanned most auto stores such as auto zone/advanced auto [check ur local area]offer this service for free they can also reset the code [computer]for u

Jun 10, 2010 | 2004 Chevrolet Monte Carlo

2 Answers

OBD-II CODES P0302,P0304, AND P0353 DISPLAYED ON CODE READER. REPLACED ALL 8 NEW IRIDIUM PLUGS AND 3 NEW COILS ON CYL.2,3, AND 4. RUNS FINE BUT SERVICE ENGINE LIGHT IS ON NOW SINCE REPLACEMENTS.AFTER NEW...


before replacing anything you must first erase those codes. and give it time to see if they come back go to auto zone or advance auto parts they will erase codes for you for free .

Jan 09, 2010 | 2001 Ford F250 Super Duty Super Cab

1 Answer

1984 volvo battery light is on


CHECK BATTERY VOLTAGE. IT SHOULD BE 12.5 VOLTS. IF NOT CHARGE BATTERY HAVE IT LOAD TESTED FOR DEAD CELLS. MAKE SURE BATTERY CABLES IS CLEAN AND TIGHT. FREE FROM CORROSSION. NOW IF BATTERY CABLES IS THE ORIGINAL CABLES. REPLACE THEM. NOW CHECK THE ALTERNATOR OUTPUT. USING A DIGITAL VOLT METER.IT SHOULD BE 13.5 TO 14.5 VOLTS.WITH CAR RUNNING IF NOT REMOVE ALTERNATOR HAVE IT CHECKED OUT AT AUTO ZONE OR ADVANCE AUTO PARTS .BESURE TO TURN OFF RADIO.BEFORE REMOVING NEGATIVE BATTERY CABLE.BECAUSE IF YOU DONT.YOU WILL LOSE RADIO CODE.AND RADIO WONT PLAY WHEN YOU TURN IT ON.

Aug 04, 2009 | 1995 Volvo 850

4 Answers

Honda radio codes I have just bought a used Honda CR-V in the Caribbean, and need to change a few things, removed battery and cd player died. I cannot find the sticker anywhere with the code and do not...


Don't post your s/n & vin online!!

FREE and EASY methods to get your Honda radio UNLOCK CODE. (Dealerships usually charge)

Assuming you don't have the Anti-Theft Code and Serial Number that is found on the credit card sized Anti-Theft Radio Identification Card that comes with the vehicle at the time of purchase and is usually found in the glove compartment....

You have FREE options to retrieve that code by phone or on the internet BUT, the RADIO SERIAL NUMBER is REQUIRED (no matter what). (see bottom about removing ERROR E3)

***IF your Honda was made BEFORE 2001 the serial number MAY not be accessible without removing the radio from the vehicle.***

* TO GET THE SERIAL NUMBER (so that you can get the unlock code)

1. Get something to write with and on (you'll need it to write down the serial number)
2. Put the ingnition key in and turn it until your able to turn your radio on (accessories position).
3. Then turn your radio OFF by it's knob/button (but leave the ingition key in place).
4. Hold down the preset buttons 1 and 6 at the same time.
5. Turn the radio on while pressing down both the 1 and 6 buttons.(***IF your Honda doesn't have preset buttons on the radio then hold down the top part of the 'Seek/Skip' button AND the top part of the 'Change Disk' button instead.*** )
6. Write down the 4 numbers you see first and then 4 more that display. These eight numbers are the SERIAL NUMBER. This is NOT your CODE.
7. Make sure your VIN (Vehicle Identification Number) is handy to get the unlock code. (can be found on your insurance card, driver's side door jam, small plate on dashboard by registration and inspection stickers, etc)

* TO GET THE UNLOCK CODE (using the radio Serial Number and VIN)

---Internet option:

1. Go to https://radio-navicode.honda.com/ (YES, it's run BY HONDA and IT'S FREE)
2. Follow on screen instructions (Serial Number and VIN required)
3. Type in the 5 digit code into your radio. This will unlock the radio and return it to a functional state.

-OR-

---Telephone option:

1. Call American Honda Customer Relations (800) 999-1009
2. When the automated message starts 'Press 3' for 'Radio and Navigation Codes'.
3. Tell the Customer Service Agent you need your radio code. (They will ask for your name, your radio's serial number, VIN, etc)
4. When they give you your radio unlock code--WRITE IT DOWN and KEEP IT SAFE!
5. Type in the 5 digit code into your radio. This will unlock the radio and return it to a functional state.

* REMOVING ERROR E3

****If you entered too many wrong codes and got an ERROR E3 message displaying you'll need to do an additional step for even the correct unlock code to work.****

Disconnect your negative battery terminal (or pull the radio fuse out if that's easier for you) for 30 seconds then reconnect it and then the radio will say "CODE" again and you can put in your correct unlock code.

-----------------------------------------------------------------------------------
So what happened to begin with?
See also: http://automobiles.honda.com/information/frequently-asked-questions.aspx?Question=2

If the power from your battery to the Honda radio is interrupted the Anti-Theft feature kicks in, the radio is rendered inoperable and the screen reads 'CODE'. You must enter in the Anti-Theft Radio Unlock Code (usually 5 digits) to make it operational again. You know that much by now.

May 30, 2009 | 2004 Honda CR-V

2 Answers

Radio Code 2002 Porsche 911


You need to recover the radio's serial number to decode the 4 digit radio key. The full process and decoder is available here: Porsche - Online Lost Radio Code Recovery Tool

Mar 22, 2009 | 1999 Porsche 911 Carrera

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