After wrapping up my HG renovation, The DS O2 popped a P0130 code. After tearing the IM back off, I found that there was a bit of wire that might have been causing the short. ( I had to replace the O2 connector as it somehow got trashed.). After repairing the short and multiple multimeter tests as my buddy and I put the car back together I thought I was good to go. Not the case. Now I am getting P0134 [O2 sensor circuit no activity detected (bank 1,sensor 1) Front sensor LH bank open circuit)] and P0154 [ O2 sensor circuit no activity detected (bank 2,sensor 1) Front sensor RH bank open circuit ]. I'm driving with an open loop all the time now.
Here it where it goes strange: I DID ABSOLUTELY NOTHING TO THE PS SAVE CONTINUTITY/VOLTAGE TESTS!!
Does anyone within this august body have any ideas? I am trying to avoid a LR specialist but I've run out of ideas.
Thanks!

 

I know this sounds dumb, but with all the stuff you've done having the adaptive settings reset can make a difference. I don't know how many times people toss on a MAF, 4 new O2 sensors, or a new IAC, and then nothing seems to have changed. That's because the ECU has "learned" from the original sensors and it "adapted" to them. By resetting the Adaptive settings it goes back to a default baseline and then learns the settings from the sensors again. Also make absolutely certain that none of the wiring got pinched or nicked during the install. Is the ground re-installed behind the drivers head to the bulkhead? I've seen that cause some crazy things as well.

 

Best- I have to admit that I have chucked parts at my D2 in the past, but not this time. I checked that ground strap fist thing this AM and it was secure. I was very meticulous about pinched wires and carefully re-wrapping the bundle when I completed and inspected the splices.
I fully understand what you are saying about the adaptive settings, but how can the "old" adaptive settings say there is an open circuit? Clearly something is up in that now both the DS and PS are affected, yet I did nothing to the PS wiring during this failex.
I think you are saying that over a period of time, the ECU will "re-learn" and the open circuit will go away?

 

Well if reset it goes off a baseline & if triggered again = certainly something is amiss. Resetting the Adaptions was standard on pretty much all LR visits to the Dealer.

I'll think about it some more!

 

Thanks, the LR stealership near me would probably charge $300 just for a reset.

 

Okay, so I just installed brand new Bosch O2's. No joy. Still throwing the P0134 [O2 sensor circuit no activity detected (bank 1,sensor 1) Front sensor LH bank open circuit)] and P0154 [ O2 sensor circuit no activity detected (bank 2,sensor 1) Front sensor RH bank open circuit ]. In watching my Ultra Gauge, The highest the voltage got on Bank 1 was 0.495 and the highest on Bank 2 was 0.525. Clearly off the starting voltage of 0.445, but it never dipped below the start voltage.
I am really at a loss to understand what is the cause of this. Anybody?

 

No it doesn't.

 

Probably pinched the harness under the head. But it's ok , you only wanted to keep the car for a little bit not 100k so just run it right?

 

Before you go chasing harness pinches, try wiggling the connector on the ECM.. Sounds like you might be having a similar issue to mine. What did you probe the connectors with when you tested continuity, I think either myself or a previous mechanic used a pin that spread the contacts open in the connector and now the connections are not reliable. I can push the connector and then get correct readings again.

 

Yeah, maybe working in the engine bay spread a connector on the ecu under the glove box. And maybe if I start golfing, Paige Spiranac will bring me Gatorade topless, about the same chance.