O2 sensor fault code

[FuzzFaceFreddy4]

Hi - I never put my head under a bonnet except to charge a Battery or fill oil up until recently and don't know much about cars at all. But I'm broke so, needs forced me to try and fix the car but now I am stuck.

I was having a problem that the car, it wasn't pulling very well and then engine light came on, so I bought a cheap OBD reader and it comes back with P2196 o2 sensor signal biased /stuck rich Bank 1 Sensor 1

So, I cleaned the MAF with some proper spray and while i was there changed spark plugs and checked and replaced an ignition coil pack.

Now I am stuck, because the error code is back on there showing engine light on dash.

I have been reading up on this fault but don't now where to go from here as I cant find the other sensor (the one before the cat) and i dont know how to check or adjust fuel pressure regulator either.

Can anyone tell me where to find the 'other o2 sensor' or how to maybe go about the next part of this? Should I first replace the MAF? Thanks

[flash22]

The A/F sensor (aka Lambda or o2 sensor) is pre cat, fuel pressure is all ECU controlled, if the o2 is stuck rich it will make the engine run very lean

 

I would only use Denso or Bosch o2 sensors - they are not cheap but will last, (Denso DOX-0269)

location wise it's in the top of the cat on the right-hand side just below the top heat shield as you look at the engine, you cant miss it its the only thing with wiring going to it, on the top of the exhaust

 

 

[FuzzFaceFreddy4]

4 hours ago, flash22 said:

The A/F sensor (aka Lambda or o2 sensor) is pre cat, fuel pressure is all ECU controlled, if the o2 is stuck rich it will make the engine run very lean

 

I would only use Denso or Bosch o2 sensors - they are not cheap but will last, (Denso DOX-0269)

location wise it's in the top of the cat on the right-hand side just below the top heat shield as you look at the engine, you cant miss it its the only thing with wiring going to it, on the top of the exhaust

 

 

Cheers Bob...much appreciated