Hi my 206 came up with a anti pollution fault running super rough and wouldn't go over 3000 revs tried to drive home car stalled came up with immobilizer fault for a minute then saying eco mode so now car wont start there is no power at fuses under the bonnet I have changed the fuse box with no joy HELP......
any ground fault can cause faults.
your just going to have to be systematic and check all power and grounds under the bonnet.
a single jump lead can help.
battery neg to chassis for example,
if there is any ground fault in to battery to chassis this make them light
if I recall there's a suspect ground wire that runs to the passenger chassis leg