I spent the weekend driving in some deep snow. My cel is on and it has 8 o2 sensor codes. I haven’t had time to look over it yet but I’m thinking a wire broke or I have a bad ground. Anyone else ever had this issue? The codes are:
p0130 (o2 sensor circuit bank 1 sensor 1)
p0171 (system too lean bank 1)
p1171 (manufacturer control)
p0430 (catalyst system efficiency below threshold bank 2)
p0153 (o2 sensor circuit slow response bank 2 sensor 1)
p0141 (o2 sensor heater circuit bank 1 sensor 2)
p0139 (o2 sensor circuit slow response bank 1 sensor 2)
p0327 (knock sensor 1 circuit low bank 1 or single sensor)

Obviously it runs rough at idle and the exhaust is eye watering. Any input is appreciated

 

My thoughts on Disco o2 sensors in general, hopefully it will be useful to your situation:
1) Assuming you haven't ever changed them out- go ahead and change them out, at least the front pair. They are very accessible and with an o2 sensor socket it's pretty quick work to swap them out. o2 sensors read lean as they age so over time the ECU is adding more and more (unneeded) fuel to compensate. With the (lack of) fuel economy of our old trucks and fuel prices these days it doesn't take long for a fresh set of front sensors to pay for themselves if the current set is old! Some folks swear by the OEM sensors only, but I've had good luck with Walkers that I found on Rock Auto for a good price.
2) Only the front o2 sensors are actually needed to have a well running truck. The fronts are providing the feedback to the ECU, so focus your initial energies there. The rear o2 sensors are just there to see if the catalytic converters are running properly, but they don't actually effect how the engine runs (obviously they will still light up the CEL).
3) I'm taking a look at the circuit diagrams and the sensors are all supplied power directly from the fuse box and then all "grounded" at the ECU though separate connectors, so I'm not sure that single grounding error would cause a problem with all 4 sensors.
4) It looks like they are all supplies power though connector C0449, located right behind the brake fluid reservoir. So maybe start your check there. I've tried to attach a screenshot, hopefully it took. Good luck!

 

Everything is bank 1. Swap sensors left to right and see if it follows the sensor. Yes? Bad sensor, no, not the sensor.

 

Check the engine bay's 15A F2 fuse that controls EMS consisting of SAI, Purge valves, Camshaft position sensor, EVAP canister, Leak detection pump, all 4 O2 sensors and MAF. If F2 is blown, one of the O2 sensor wires probably shorted to ground.

 

Just thought I would come back to say my issues have been resolved. The wire that goes to the drivers side knock sensor was smashed between the engine block and the bracket for the power steering pump. Most of the codes went away when that was fixed. Despite having replaced my o2 sensors less than a year ago both of those were bad as well (yes they were the oem Bosch sensors) 2 new sensor fixed that. My OBD2 scanner says that everything is happy. Thanks for your help.