2002 Tachoma v6 3.4l check engine light

[plumberontime]

Thanks for the help.
my check engine light was on and i had it hooked up to the computer.
it said 1 or 4 sensors are out on the exaust side of the fuel system. the guy said there were 4 of them. is there a web page that had a help picture on where all these sensors are?
I already replaced the TPC sensor on the intake side. $45.00 later I think ill try to test the sensors seperately. Thanks for the help
Chris