Location of PO134 O2 sensor on a Mitsubishi Galant 4cyl. 2004

Question

Thanks for getting back to me, but there are two sensors, left and right that go into the large heat shield, that I am assuming covers two cats, facing the front of the car and two more sensors below the engine going into exhaust pipes that can be seen from under the hood also. Which one needs replacing? Left or right? Thanks much.

Puzzled

Answer 1

Hello again,

Here is a diagram for the sensor, I highlighted the one you need to replace. Sorry for not being clearer first time around.