[JSav86]

I'm having a problem I'm getting codes
P0158
P0057
P1706

I disconnected all the sensors and the voltage drops except bank 2 sensor 2 which the code is for it says 1.2v steady and the others vary from .2-.6
I'm assuming there's a short but i don't know where to look
The harness kind of melted to my egr tube but not all the way just part of the outside this is after installing a header and bypassing the other 2 sensors the bypassed ones and bank 2 sensor 1 are all reading perfectly

 

[i68k]

P0057 NISSAN - HO2S22 Heater Control Circuit Low
P0158 NISSAN - HO2S22 Circuit High Voltage
P1706 NISSAN - Park and Neutral Position Switch

sounds like you got 2 things here. your pnp switch (or clutch pedal switches if its manual) and your o2 sensor.

im just a bit confused here? your harness melted to your egr tube? hoping youve fixed your wiring, remember to use solder on voltage specific wires. how did you bypass your secondary sensors? you didnt use antifoulers? did you already try a new o2 sensors bank2sensor2?

 

[JSav86]

I rewired them and no I have it unplugged and I'm getting 1.2v while unplugged I need a wiring diagram because 2 of the plugs are cut for the rewire and none of the wires got melted

 

[JSav86]

Part of the connector got melted

 

[i68k]

ahh, im not sure how you rewired them, there are a few ways of wiring to accomplish the same results. did you check the specs in the fsm for the o2 sensor? sounds like theres a short, or its drawing from something else. if the copper in the wire gets hot enough, the heat will travel the copper and melt stuff on the way, so youll need to follow the wires that are melted as well. any break needs to be soldered, o2 sensors are voltage specific.