50%+ calculated load at idle

[Scubaru Steve]

starting the car cold -15C and lower the car runs for 10 seconds and continues to idle down untill it dies, turn the car off and restart its completly fine. cars long term fuel trims are pulling 20% fuel. calculated load is 50-60% and total load is 20% at idle. seems excessive. new plugs, maf cleaned properly computer reset and still having the same issue.

anyone experience this?

2007 yaris sedan 1.5 automatic.

Thanks in advance!