hHey, I recently bought a 2004 Discovery II and can’t pass emissions until I fix the following codes.

P0135

P0141

P0161

P0150

P0126

P0139

P0134

I was told that because most of them are o2 sensor related, it might be that the wiring is bad rather than just the individual sensors. Any advice?

 

Have you inspected the sensors and connectors yet? It's very common for O2 sensors on these to fail, esp after 120k miles.

 

The o2 sensors look old. The casing for the wires are coming off, so I went ahead and bought 4 new ones. However I did find a shredded wire that I didn’t know where it went to. Anybody know what this this does?