One problem related to software has been reported for the 2003 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Nissan Altima based on all problems reported for the 2003 Altima.
When I was came home from shopping I stop car and switch off and go home after about 15 min going to some where but car take time to start after few second car start. Try 3 time same. Next day going to work and same starting problem start car and going about 1 mile drive power cut off and luckily no one behind me abele to go on side because can not do anything no break no gas god help me after one mint start car and rich work about 2 mile . At work we have mechanic he has software for car diagnosis he check and told me code p0340 for camshaft position sensor we change one bought from dealer after 2 hr going home same problem starting. Mechanic reset and go home next day going to work same thing happened power shutoff about 1 and 1/2 able to park onside and start again and drop to repair shop. He called me and told me you have to change another camshaft sensor after wok fine for up to now. But they recall some car before for this problem if I was in highway then what happened do you think I will able to write now or die. Can you check on this and do something otherwise some one die. Yogesh desai.