Can someone please help me find the radio code for 2003 Honda accord? It's also showing an err3

We can't give you radio codes. You will need to call the dealer for this.

Please read other similar posts. We DO NOT have codes.

See if it was annotated in your Owner's Manual.

Check the glove box area for a sticker with an 8 digit code. This is the serial number for your radio and was put there during the PDI (Pre Delivery Inspection) process before the car was sold initially. If the sticker is missing, you will have to get the serial number using another method. Disconnect the battery, attempt to turn the radio on. When "code" is displayed on the screen, turn the radio off. While holding radio preset buttons 1 & 6 at the same time, turn the radio on. The radio display should now display 8 digits. Call your Honda dealer and give them the serial number and they should be able to give you the radio code. You will enter the 5 digit radio code using the radio preset buttons.

https://radio-navicode.honda.com/