How to fix radio nissan navara after entering code. eer comes up

You can get radio codes emailed to you from this service, follow this link:

Nissan Required Original manufactures security code required to active your Nissan car radio power loss witch is provided on behind the radio on Sticker

Never take the serial number from any printed paper work guid since this may not match the actual Nissan radio fitted to the car instead take the serial number either a label or engraving on the top or side of your Nissan stereo to ensure the supplied Nissan radio code is accurate