Can code PO705 cause your car to come to low idle speed when your slowing down ?. My idle is ok. When I’m slowing down I notice it goes up a little then as I’m slowing down it goes down to regular idle. Or it will be at regular idle when coming to stop but goes below normal and drops to about 500. No code besides the one listed. Only 93k miles on a 03 Taurus. Very well taking care of. I don’t hear any links in the lines, when warming up it does give a burnt smell for a few mins then goes away.