2005 Citroen Xsara Picasso will not run

it all started with the car pulling to ofside this was sorted with a new tyre put the car in the garage but the rear doors would not open so I thought I would press the button on the dash then it would not start rac man looked and tried but could not fix the dash shows economy mode? the rac man said he thinks it might be because the key will unlock the car if you open the door with the key in lock the tailgate does lock with r/c and it also unlocks but that is the only door that does you have to use key in the doors to get in scratching my head please help if you can.