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Help please 2009 WRX immobilizer


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Hey guys so my 2009 WRX won't stay running it'll start for a few seconds the die like I turned the key off the the security light constantly stays on after the start it's not on before tho. Icar throws a code P1572 I had the keys reprogramed well kinda the matched up to begin with that didn't help. Btw this all started after I disconnected the battery to clean the MAF and the check for vacuum leak's cuz I was throwing a code before that fr being to rich and I did have a hose disconnected from BPV to the throttle body so anyways got it all back together car sounded good ran good well for a little if I WOT it would cut out then back in CEL would flash I thought maybe the ECM was relearning the it just stop running All together and I've researched everything i could. So here I am looking for help and a second opinion

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Oh yeah I guess a scanner can't find or talk to the immobilizer is what the guy said too I'm just stuck it has a AP on a stage 1+ AEM tune it was on a stage 2 bout idled rough and wanted to die at stop lights so I did all that work and fixed but brought more pain my way

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