Possible immobilizer problem

[Denver05]

Hello.I have a unusual problem... Saturday evening after I finished my work I went to my car unlocked the car and left my backpack in it , locked the car using the key remote button.all good...I returned to my van, finished some paperwork..after I finished,came back to my car... nothing.i couldn't unlock the doors using my remote key button...I did it manually and the car didn't start...I presumed is the key Battery was dead.i opened the key, took the Battery out and went to a few nearby shops trying to find a Battery.i found one,replace it...and nothing.same problems...I brought another Battery, hopping the first one was a"new old" battery... nothing...I don't have the 4 digits code...I don't have another key...I presume the sync between immobilizer and the key is gone( kept to long the key without the battery) so I called 2 car locksmiths...they asked me about that code which I don't have...I went back toy car today...I measured the car battery..12.8v..all good...I called AA recovery man.i was hoping he will sync the key with the car but he couldn't.We started the car by bump start...did start alright...soon as I turned the engine off...same problem...I don't know what to do next.i will appreciate any ideas. Thank you

[Greenmamba]

Subaru dealer should be able to provide the 4 digit code if it's a standard UK Sigma alarm. Just prove to them you're the owner (V5 etc).

On the current problem, try disconnect the car Battery for about 30 minutes. If the alarm sounds immediately, try the remote button (may help if it's close to the car). If no alarm sound, depress the brake pedal a couple of times to bleed any residual current, then reconnect the car Battery. Then try the key button,

[Denver05]

Thanks Greenmamba.i will try that too..but I can't think only to on thing...if is the immobilizer is  faulty..or the immobilizer doesn't recognise the key...why the hell I could bump start the car? Is not that secure then.lol...i don't say anything...I was able to bring the car home.🤘👍 

[Denver05]

Update.works fine now.i received the pin from Subaru dealers ( £24 ) and I reprogramed the key following the steps in manual.is all good now.thank you all for the support 🎉🤘

All the best

[Greenmamba]

Good to hear.

[Craiglegacy]

So.. 2007 Subaru legacy, take the car to have some under ramp checks done, go to start the car and all of a sudden the immobiliser alarm fob doesn’t want to work at all.. Disconnected Battery, hooked up Battery charger, call a Subaru specialist and he suggests to pull the radio out and look for some terminal, I’m thinking well it can’t be something new as I turned it off and the car was started and driven into the workshop.. I just think well it started outside let’s push it out just on a wim that there’s something interfering with the signal and low and behold one meter out the workshop the dog starts to work again.. now I’m not sure what type of equipment a tyre specialist can have in a workshop that can interfere with the signal or if it was because the roof was made of metal I will probably never know I’m just glad it started and was able to drive home 8 o’clock at night 😂 so just a word if nothing else works try pushing the car out of the location as even a 5 meter distance can make a difference cheers