O2 Sensor

[mac777daddy]

I am getting "check engine" light so went by Autozone and the code is P0136. O2 Sensor Circuit Malfunction Bank1 Sensor2. Does anyone know which O2 sensor this is? Before or after catalytic ? 2004 4runner V-6...Thanks

 

[techno]

Sensor 2 is always the one after the cat. Bank 1 is the side where the no.1 cylinder is (passenger side for the 1GR-FE).

 

[mac777daddy]

Do you know what brand is factory installed 02 sensor?

 

[lightfreak]

The OEM sensors are Denso, you can get them on Rockauto cheaper than the dealer.

 

[mac777daddy]

Thanks!!