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[tango]

Long story lol
I measured the reading between the two white wires and it was zero
So it was buggered
Now coming to removing that o2 sensor it wasn’t budging
After fighting with it for ever lying under the car wasn’t the best position to apply some torque 
Drove to a local garage and they managed to take it off but the threads were destroyed as whoever put it on cross threaded it
I’ve ordered a lamda nut
Just waiting on that so can get it welded on and then hopefully put the Replacemnt sensor on
Not driving it now as it doesn’t sound very good with a hole in the exhaust
Will report back in a few days hopefully

[Nick W]

It probably wasn't cross-threaded, but just seized. It's a short, coarse thread(1.5mm) that probably only has about 3 threads engaged. It doesn't take much to ruin the threads when both parts are new

[Enceladus]

Long story lol
I measured the reading between the two white wires and it was zero
So it was buggered
Now coming to removing that o2 sensor it wasn’t budging
After fighting with it for ever lying under the car wasn’t the best position to apply some torque 
Drove to a local garage and they managed to take it off but the threads were destroyed as whoever put it on cross threaded it
I’ve ordered a lamda nut
Just waiting on that so can get it welded on and then hopefully put the Replacemnt sensor on
Not driving it now as it doesn’t sound very good with a hole in the exhaust
Will report back in a few days hopefully

Isn't this the sensor that you replaced with a used spare you happened to have, that also proved to be faulty?
The sensors that were in Bank-2/Sensor-1?
Or is it some other sensor?
Or what?

[tango]

Long story lol
I measured the reading between the two white wires and it was zero
So it was buggered
Now coming to removing that o2 sensor it wasn’t budging
After fighting with it for ever lying under the car wasn’t the best position to apply some torque 
Drove to a local garage and they managed to take it off but the threads were destroyed as whoever put it on cross threaded it
I’ve ordered a lamda nut
Just waiting on that so can get it welded on and then hopefully put the Replacemnt sensor on
Not driving it now as it doesn’t sound very good with a hole in the exhaust
Will report back in a few days hopefully

Isn't this the sensor that you replaced with a used spare you happened to have, that also proved to be faulty?
The sensors that were in Bank-2/Sensor-1?
Or is it some other sensor?
Or what?

no I replaced sensor 1 in bank 2 (luckily that came out nice )
As that was showing up faulty originally
After replacing that, sensor 2 in same back started showing up as faulty

[tango]

It probably wasn't cross-threaded, but just seized. It's a short, coarse thread(1.5mm) that probably only has about 3 threads engaged. It doesn't take much to ruin the threads when both parts are new

probably was seized and your right it only locks on a few threads but a right mess when it came out

[tango]

I bought a taper tap 1.5mm m18 as this was recommended by the garage as a better solution
And luckily he was able re thread the existing nut
The sensor went in nicely and tightened
The fault has disappeared
So currently showing no faults
I only drove it a few miles back home but will see over the next few days how it goes