To rid yourself of an exaust upgrade induced MIL,
then follow these simple instructions in our Tech Article section. For those of you who are stripping the O2 sensors, please purchase a O2 removal socket. Less than $12 dollars is way better than $120.
This is the Toyota SST 09224-00010. I think it is a 24MM O2 socket tool, but not positive as I can't seem to find mine right now.