will not idle at operating temp

What is your question?

starts normal cold, normal idle about 1300rpm plus or minus 20 % as engine warms idle drops quickly before reaching operating temp, rpm drops to zero as engine stalls restarts but dies right away unless the throttle pedal is slightly depressed and held can drive as long as pedal is depressed

What makes this problem better or worse?

operating temperature

How long has your 2010 Toyota Venza had this problem?

just started