One more question! The flap on the gas tank where you put the nozzle in is gone. Is it possible that it is in the gas tank? If it is, is there any way to get it out? My check engine light is always on. The OBDII ERROR code is PO420.

What is your question?

I’ve already replaced the catalytic converter once, and the sensors several times. I have to get my car inspected by the end of the month. I have had the serpentine belt replaced, and yesterday I heard another squeal from the car.

How long has your 2001 Toyota Sienna had this problem?

Months