I have a 2000 S70 GLT that has an idle problem. When in park the idle fluctuates from around 500 RPM to 1000 constantly. It oscillates between 500 and 1000 PRM around every 2 seconds or so in an almost rhythmic manner. When driving the idle is around 800 and fairly constant although sometimes will oscillate between 750 and 850. Also sometimes when I come to a stop the idle will get real low and feel like it might stall although it hasn't yet. I cleaned the throttle body and have done general maintenance. Any thoughts or solutions? Thanks

 

Welcome to the forum.

There is a recall on the electronic throttle. Go to a Volvo dealer, and they will fix the problem, no charge.

 

I have been to the dealer and they won't fix anything until the check engine light tells them it is the throttle. I have had this problem for a while and it does not seem to be getting that much worse. It this no doubt a throttle issue, could not be something like idle control or maf or something else?

 

The idle control is part of the throttle body.
The Mass flow maybe but doubt it.