idle ran up/down to normal this AM,chk. eng code shows RANDOM

What is your question?

It was 44deg's. today, check eng. lite came on . Idle ran a little high [ 1200rpm] to a little lower [ 700prm ] than normal at startup then ran normal . Shut it down after 30 min. running time for 45 min's.& at restart it started doing it again. Recent tune up done , running STP INJ. CLEANER in good fuel. Most part's under hood original @ 215K on FORD ESCAPE XLT w/ 6 banger. AUTO ZONE / ORIELY'S checked code's which both showed random. Code's reset after & so far no lite. Seems to me something to do w/ IDLE stuff ? Oil changed few month's ago along w/ full tune up a few week's ago. Run's solid & it does not surge, throttle return spring seems weak

What makes this problem better or worse?

happened as it was 44deg's. today...unknown

How long has your 2001 Ford Escape had this problem?

this morning only