Where are you based Wallis? There maybe somebody nearby who does have peugeot planet and can lend a hand.
Signal for the injectors comes from the ecu, not the cam or crank sensor, the firing pulse is 80v, you'll need a scope to see it. No signal to the injectors means the ecu is stopping play, it doesn't necessarily mean it's an immobiliser fault. For example, it could be lack of fuel pressure in the rail, as if the ecu doesn't see ~280bar on cranking then it won't bother even trying to fire the injectors.
I wouldn't start unplugging things to see if it causes faults, it's a fairly likely way to upset a common rail engine. Plus unplugging the maf doesn't bring up an engine light on all but the very oldest HDis.
Tbf taking the battery off for a few hours has got to be worth a try, it's free to check and you never know lol, wouldn't be the first time i've seen it work.
Signal for the injectors comes from the ecu, not the cam or crank sensor, the firing pulse is 80v, you'll need a scope to see it. No signal to the injectors means the ecu is stopping play, it doesn't necessarily mean it's an immobiliser fault. For example, it could be lack of fuel pressure in the rail, as if the ecu doesn't see ~280bar on cranking then it won't bother even trying to fire the injectors.
I wouldn't start unplugging things to see if it causes faults, it's a fairly likely way to upset a common rail engine. Plus unplugging the maf doesn't bring up an engine light on all but the very oldest HDis.
Tbf taking the battery off for a few hours has got to be worth a try, it's free to check and you never know lol, wouldn't be the first time i've seen it work.