Car has 63K miles on it. Out of the blue it started idling very rough,

What is your question?

hesitating, to the point it might not take off when making a left turn. It even seems to have trouble deciding which gear to be in. At 70MPH it seems to run smooth.. Sometimes idling north of 2000 RPMS. Service Engine soon light (not blinking) is on and so is the traction control light for anti-fishtailing.