2002 nissan altima p0507 idle problemThe car idles up and down from 500 to 2000 rpms in park idle,my test is Closed throttle is done by turning the key from OFF to ON position in sequence 10 seconds OFF 2 seconds ON 4 times in a row. IAVL gets done by a scanner. Clean your throttle body flap and inside the chamber before you have the IAVL done. IAVL is "intake air volume learning". PROBLEM OK...i have a new problem car no power max 2000 rpm

SOURCE: 2005 sentra idling high (1500rpms)

pull the IAC out and make sure that there is nothing blocking it from the throttle body from cleaning it. while you have it out go ahead and clean the IAC. the only way that I know to check it is pull it out and leave it plugged up to the connector turn the car on but dont start and see if the probe moves in or out.

SOURCE: 2002 NISSAN SENTRA GXE 1.8 POOR IDLE LACKS POWER IDLE FLUCTUATES BETWEEN 1800 TO 1100 RPM

Check for vaccume leaks and also you PCV valve. check the hose too. Visually inspect every vaccume hose you can find. Sounds like a leak .

SOURCE: 2002 nissan altima p0507 idle problem

I had the same problem before. after using the scanner i got a code number P0507. "Idle Air Control", New 2002 and up Nissan models like my Altima don't have an idle valve or sensor like older models to be replace. Here's the solution " Replace your "Throttle Chamber" the idle sensor is build in it, there is no other way to fix this problem. the throttle chamber is about $175.00 at your Nissan Dealer. The need your core or you will need to pay extra money. No need for expensive mechanic shop, you could do this your self. the throttle chamber is so easy to remove, four screws holds it together. I will take you about ten to twenty minutes to replace it. Please trust me and you will save big bucks!!!!!