Toofasgtp

Previous owner that had the car had this code and only code that the car throws. She stated they had both replaced. Well every time it comes on i just clear it out and it is good for a day or 2. Past few weeks i noticed that it does not come on while cursing but when slowing down like coming down from highway speed.

Now my last car Buick Regal GS HATED and i mean hated bosch sensors and would really only work right with ACdelco sensors. So i am beginning to wonder if this could be the same thing. What if they used the off the self bosch instead of denso or oem? Is there a way to tell what brand is in their with out pulling sensor?

Is there any other things i should check out before i start spending $130 on a new sensor?

95ES300 -- when i got the car i did sea foam and plugs.