Originally Posted by jimmergb1
I replaced the sensor on the catalyic converter but the check engine light keeps coming back on. This is on a 2005 Toyota Tundra V8. Help!!
Need some more info, what code is the CEL? That will point you in the right direction. Autozone reads the code for free if you haven't already.
Not sure if you have one or two sensors, the one that is upstream from the cat converter is the one that is important to engine input for air/fuel ratio.