306 hdi wont start?

i have a peugeot 306 hdi diesel 2001
the car turns over ok and there is diesel getting to the injectors I cracked the pipe nut and was diesel there and power to injectors
it sounds like an immobiliser fault like the key has lost its code
ran scanner and it said injector circuit code po200 the AA mr reckons its immobiliser
the car turns over as though it wants to start but wont, the battery is fully charged
the lift pump in the boot appears to be working ok
tried a squirt of easy start down intake (I know its wrong) and it ran for 2 seconds then revved to max so I turned it off would not start again without a squirt, then only for a couple of seconds, but would not rev
would that eliminate the immobiliser problem or was it just running on easy start and now theres oil coming leeking from somewhere!
any help would be appreciated