Ok i was having clutch problems so i took my car into my mechanic to have everything worked on, he had to disconnect the battery to work on everything, once he was done he connected the battery and tried turning on the car but it wouldnt start, i figured the key disprogrammed itself so i had a locksmith go and reprogram the key for me and still it wont start, all the lights turn on and it sounds as if the car wants to start but it wont, when hooked up to a computer it reads "security". Any ideas? btw my car is a 03' g35 coupe 6mt. Any help will be greatly appreciated ive searched like crazy but cant seem to find anything that can help me out. Im willing to paypal someone cash if they can help me figure out what might be wrong. Once again thanks alot.

 

did you buy the car used from someone?? if so maybe they had installed an aftermarket alarm. my POS is like this, i have to hit the unlock button after i reconnected the battery, has a starter kill.

 

if it helps any i am now receiving code p1615

 

NATS MALFUNCTION
P1615
BCM can receive the key ID signal but the result of ID
verification between key ID and BCM is NG.
Refer to
BL-163 .