Question

2003 Nissan Altima, what the sensor for this code p0507?

Answer 1

Hi there

With the electronic throttle body this code isn't specific to any one or single sensor. It's possible you have an intake leak that is causing the high idle, it's also possible it's as simple as cleaning the throttle body to solve the problem. 

Here is some more info on the code for you.

P0507 NISSAN - Idle Control System RPM Higher Than Expected

Read more: https://www.autocodes.com/p0507_nissan.html