Nissan Repair: what can be this, nissan altima, lock smith

Question
MY  NISSAN ALTIMA 2003  I STOP   WHEN I CAME BACK  NOT  START  I CA
CALLED  LOCK SMITH   AND  THE  COMPUTER  SHOW   [IMMOBILIZER ECO][IMMO ECO] WHERE IS THAT  PART        AND WHAT IS  THIS

Answer
Hi Jose -

If you give me the "P0" number from the OBD computer, I can tell you what it is. I am assuming that's what was done from your message? I apologize, I am not quite understanding it.

But if you had a computer diagnostic, there should have been a code.

Let me know -
aloha
calvin