Code required to enter after car battery reconnected

Disconnect the car battery for 30 mins , try again once the battery has been reconnected.

depends on the radio you bu. If the radio you get has a removable face then the code is stored in the face. If you get a radio that is all one part then it will have a code that you will have to enter every time the battery is removed. If the battery removal is something you do regularly then go to a battery supply shop and enquire about a back up pack that plugs into the data link and maintains all the electronic settings while the battery is out

When you disconnect your battery and then reconnect it again, it disables the radio. This is an anti-theft protection for your car radio.
The enable your radio the activation code is in your vehicle owner's manual. If you do not have this code you need to go to your vehicle manufacturer's service centre and get them to enter this code for you.

Disconnect the battery for 10 mins, reconnect the battery and enter the code.
OR
When you disconnect your battery and then reconnect it again, it disables the radio. This is an anti-theft protection for your car radio.
The enable your radio the activation code is in your vehicle owner's manual. If you do not have this code you need to go to your vehicle manufacturer's service centre and get them to enter this code for you.

Disconnect the battery for 15 mins. reconnect the battery and now you can enter the correct code.

When you disconnect your battery and then reconnect it again, it disables the radio. This is an anti-theft protection for your car radio.
The enable your radio the activation code is in your vehicle owner's manual. If you do not have this code you need to go to your vehicle manufacturer's service centre and get them to enter this code for you.

Disconnect the car battery for 10 mins.
Reconnect the battery then enter the radio code.

When you disconnect your battery and then reconnect itagain, it disables the radio. This is an anti-theft protection for your carradio.
The enable your radio the activation code is in your vehicle owner's manual. Ifyou do not have this code you need to go to your vehicle manufacturer's servicecentre and get them to enter this code for you.

Disconnect the car battery for 10 mins, reconnect the battery and then enter the radio code.

If it is the correct code, you may have entered it a few times & locked the system. Either disconnect the battery & wait a minute & reconnect & retry, or pull the radio fuse & retry after waiting a minute & reinstalling.

Some radios hold the codes for a few Min's.However ,Disconnect the battery again and leave disconnected for an hour.Then reconnect and Enter codes and confirm.Should work ok.