Plx wiring help

[blazinblue]

After wiring my plx with the dm-5 gauge, it just reads "rch" it does not give a a/f reading. This is my first time wiring a wb so im still a noob. it gives me the rch reading even before the oxygen sensor is connected, need some input. Thanks

[thunder550]

The wiring should be pretty straightforward. You sure the wiring for the O2 sensor is all connected correctly? The only thing that is more difficult than a direct plug-in is the power and ground, which it sounds like you have done correctly.