# 2002 Nissan Altima. Anti-theft problem?

**URL:** <https://community.cartalk.com/t/2002-nissan-altima-anti-theft-problem/73988>\
**Category:** Maintenance/Repairs\
**Tags:** nissan, altima\
**Created:** [August 8, 2012, 9:49pm UTC](https://community.cartalk.com/t/2002-nissan-altima-anti-theft-problem/73988 "2012-08-08T21:49:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![treyw](https://avatars.discourse-cdn.com/v4/letter/t/a5b964/32.png) [@treyw](https://community.cartalk.com/u/treyw)\
**Post date:** [August 8, 2012, 9:49pm UTC](https://community.cartalk.com/t/2002-nissan-altima-anti-theft-problem/73988/1 "2012-08-08T21:49:41Z")

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I had a new computer put in this car, and one of my two keys was “flashed” to match the computer. After a few weeks, my car won’t start, and I wonder if I accidentally used the wrong key and some sort of anti-theft or something is keeping it from working. I have now tried both keys with no success, so I don’t know if I’ve really messed it up, or if it has nothing to do with the keys. Any ideas on how I can narrow it down? Thanks.