2006 Peugeot 307 Dash board display code meaning

All that means is the battery in the remote is weak. You need to replace it. Once you replace it, you may need to reprogram the remote. Here are the direction (off the top of my head).

, First, turn the ignition key on (don't start the engine) Next, press and hold the lock button for aprox 10 seconds. After that, turn the key off and remove the key for another 10 seconds. See if the plip key works.

If you have more than one plip key to replace the battery in, just repeat the directions for it.

Let me know if this helps.