I have a 2000 Nissan Altima GXE. When I turned the ignition over, it wouldn't start there was only a clicking sound. After several tries, it finally started. It ran for one day and then started the same thing again.

Clutch safety switch maybe . There is a electrical circuit that won't let Battery voltage go to the starter unless the clutch pedal is pressed . The switch should be on top of the clutch pedal arm . You would need to lay on the drivers floor board an look up under the dash . Two wires , green with white stripe - this is the B+ side of the switch , the other side is black . trying to start the vehicle there should be battery voltage , you can use a volt meter to test it . You can also check the other wire as well . If there is no B+ voltage , up stream from the clutch switch is a clutch interlock relay . Here is a web site for free wiring diagrams , do you know what they are ?
http://www.bbbind.com/free_tsb.html Enter the vehicle info. Year , make , model an engine size . Under system click engine , then subsystem click starting . Click the blue link .You will see the ignition switch , the other things i mention . Do you know how to use a DVOM - digital volt ohm meter ?

try to turn ignition on and jump the cyliniod if it starts than the cyliniod would be the problem if nothing happens i would say its the ignition be sure to ckeck your fuses and relays i hope this helps you please give me a good rating thank you

I have a 2000 Altima GXE. My alarm goes off intermittently and sometimes will not stop until battery lead is pulled. Have removed fuse and relay. Please help :)

It could be a bad ignition switch, do you have instrument panel warning lights when you try to start it?

possibly the wires are loose or shot mayb try and replacing them

try to go to autozone (or other auto parts store) for a free engine diagnostic. most likely the crankshaft position sensor is bad.

if your key is a transonder key wich has chip in it give it a couple of minutes to reset the code keep key in ignition and wait to see if it reads key or try another key and see if you have sameproblem make sure you unlock steering wheel disconnecting batteryfor posts might have reset car computer and cannot read ur key...

change your starter i have a 99 altima had the same problem i changed my starter it workd fine now just change it i knoe its it....

If you have a tape cassette player in the dash, this can cause a sound like what you are describing. Even though a tape is not in it,,, it can still freak out and cause this sound. Had this happen on several of my old vehicles. Let us know if this helps. Leave feedback for others to see. Thanks.

Hi what is happening is that your turn off your car and left the wheels turned to one side and specially if your car is parke in a hill what you have to do is to force the steering wheel to the same direction of your wheels this will free up the ignition switch it is going to be hard let me tell you but it will work and this is why your shift don't work once you have the ignition switch free then your shift will work again