Got these 3 codes & a Check Engine light (not flashing) after an engine install, so I replaced all 4 O2 sensors and still get the same codes. After reading a couple other posts, I don't believe the parts from AB were defective. I can clear them with my UG, but they come right back. Truck runs great...no symptoms. Any suggestions???

 

Do you have a real time scanner so you can read the activity of each 02 sensor?

 

I have an UG...brand new to me so I'm not sure if it has that function or not. If not, than no, I don't.

 

Dan, I would be interested to hear if you have made any head way with this as I am fighting the same issue. Recently replaced plugs wires and all,o2s winth Bosch direct fits.
What o2s did you use?

 

Just got it back from the shop. They said O2 sensors tested within normal range and that their equipment could not drill down any deeper into what's going on with the ECU because they don't have Land Rover specific software.

A week in the shop and I'm back to square zero!

 

When you installed the new 02's, did you clean the connections before replacing them?

 

Yes, but I did not use dielectric grease or anything afterwards.

 

I will reaccomplish and see what happens.

 

OK, so unplugged all 4 for cleaning. I noticed that the front Dr Side one, the female plug (the one that goes to the ECU) has only 3 gold prongs:



I also noticed the one on the passenger side has 4:



The one with 3 does not appear to have one prong broken off. It looks like that's the way it's suppose to be but I'm not sure. I did check the old O2 sensor to see if the plug had a prong stuck in it or something, but it's clean.

So, can anyone verify how many prongs the front Dr Side plug (to ECU) has?
If it's suppose to be 4, could this throw all 3 of these trouble codes?

 

it actually looks like the prone is there just pushed back into the plug