P0159 O2 Sensor Circuit Slow Response (Bank 2 Sensor 2)
P0160 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)
P0161 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2

Before I go replacing this/these on my friends 04 Disco... could there be something else causing the codes?

She already has the O2 sensors as a "local mekanic" told her the rig needed them.

Bank 2 is the passenger side and sensor 2 is the farthest from the engine right?

Thanks,

Josh

 

So the mechanic replaced them? I would take it back.

You are correct on the location. Might want to check the plugs.

 

What brand of 02 was installed, were all 4 replaced?
Could be a connection issue or a wire harness issue, could just be a bad 02.

 

NOT installed. she just bought them and has them in hand. She has the original sensors still in. Her disco has about 35k.

She has only two of them. I dont know which two. I think they are the front two, I haven't seen them to confirm.

She ordered them from a LR dealer in Florida. So OEM....

 

sounds like a connection prob clean and dielectric connections. Even if and when you replace O2s

 

will try that!