Please help us figure out what's going on with our 2003 Altima. The engine idel revs continually between 900 and 1800 rpms. We've received a code p0507. Prior to this reving there was just a high idle. After squirting throttle body cleaner, it changed to the reving between 900-1800 rpms. Please help.

You may have a problem with an EGR valve or the throttle body may need replaced. Just two things you can start with!