there is no code, however two things to do
* first check the relays at the front of the battery have not been disturbed, one of them looks after the immobiliser as it is linked to the fuel pump, remove them carefully and clean the terminals with sandpaper or similar. Check there are no loose wires underneath as well as they get brittle with old age. Pop them back in carefully.
* second, if the above does not fix it, disconnect both the battery terminals, get a cable tie and tie the two loose wires together for a couple of minutes, cut the tie, re-attach the battery and the car should start. You could just stand there and hold it, but makes your arm tired. This powers down the ECU and CODE box
Finally, it may the the aerial around the key in the steering column, they do fail and it may not be able to 'read' your key. The Fiat Bravo uses the same part, get one from a scrappy for a few quid
this is assuming the engine turns over on the starter but does not fire, if the starter goes not go or sounds slow, something must be draining the battery if you have had a new one fitted.
Last edited by purple145; 04-05-14 at 10:01.