I've seen the instructions for the idle relearn for a 2002, and not knowing anything more than the absolute basics about cars (changing oil, brakes, and rotors) I'm not sure if those instructions would work at all on my manual 5 speed 2003 Altima 2.5S

If someone could be so kind as to either inform me if this would also function on a 2003, and any other possible troubleshooting tips on how to figure out what's causing this issue...I'd hate to go to the dealer and have them perform a function that I could do at no or low cost...

 

Idle control problems with the 2.5's is caused by the idle air control valve that is attached to the throttle body........you will need a new throttle body and have the dealer reprogram the idle, it is not something you can do yourself.

 

by the way, i'm not sure if it's a good idea to base your 2003reparations on a 2002 guide. nissan changed models between those two years. under the hood it's very different...

 

Hmmm... an 02 altima and 03 altima's 2.5 motor is the same..... but there is no relearn you can do without a nissan consult.