Hi Guys,

Well I've reach 160,000km on the contour 96, 4cy,
great car but lately it's starting to act up.
Rolling idle started winter, but cleared up with warmer weather. (no codes). No the idle is also fluctuating with warm weather, it just bounces between 500 and 1500 at idle.
Also when I'm running out of gas say less than 1/4 tank
check engine comes on with P0133 and P1131. After I fill up
the next day the check engine light turns off. Any clues to what it may be.

Thanks