I got a P1133 code which is upstream O2 sensor gone bad I think. Anybody know where it's located or have a video. 99 legacy L 2.2

There should be two sensors both on the forward Catalytic converter one front and one back.

On top of the first cat. Wire runs down the bellhousing from the main harness on the passenger side.

I was looking around the exhaust manifold. I will look under the car tomorrow. Thanks

Thanks

Edited September 8, 20178 yr by Tort62

I was looking around the exhaust manifold. I will look under the car tomorrow. Thanks

 

If you remove the air intake items from the throttle body and shine a flashlight down on the right side of the engine your should be able to see the wire that runs down to the FWD O2 sensor.

It can be replaced from above or underneath? Special tool needed?

I did mine from underneath. 7/8" Oxygen Sensor wrench

 

Harbor Freight

 

I can see the sensor under the cv axle. Simple job?