my 306 wont start after the battery has gone flat.
the red alarm light does not come on and the ecu light is also not on.i take it i have an immobiliser problem.please could somebody advise me what to do
I would disconnect the battery then give it a good charge for 24hrs.
Re-connect it & try again.
If it won't turn the engine over you will need a new battery.
I would call a mechanic.
Since you don't tell us the engine type or other essential information, we can offer no sensible help.
Google "Peugeot BSI reset" and follow the steps.
Also check the drivers handbook instructions for re-syncing the key.
Edited by Gibbo_Wirral on 16/03/2015 at 13:27